Free videos to help you learn and understand concepts in Trigonometry.

I introduce and do examples of solving oblique triangles using the law of cosine.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

OVERSEAS

Law of Cosines

I introduce solving oblique triangles when the information given is in the SSA form...or the ambiguous case.  In this setting there may be one solution, two solutions, or none at all.
I Made a NEW lesson for Law of Sine Ambiguous Case
   • Law of Sine Ambiguous Case  

NOTE:  At minute 14:37 I incorrectly stated 61*sin(39)=37.8, it is 38.4.  At minute 16:50 I state that angle B is 48.4 degrees.  I hit the wrong button, it is 50.2 degrees.  There are   annotation corrections, though they will not be visible on an iPhone or iPad.  I am very sorry for the errors.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Ambiguous Case for Law of Sines, Please read description

I go over examples of evaluating Linear Speed, Angular Speed, and finding Arc Length while measuring rotation using radians.  In this video I keep saying Velocity matching language of textbooks I have used in the past, but since the measure of velocity also incorporates direction I should be saying speed.
Linear & Angular Speed Part 2
   • Linear & Angular Speed Part 2   Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Linear & Angular Speed Part 1

I introduce Inverse Trigonometric Functions.  I explain where the restricted range values of inverse sine, inverse cosine, and inverse tangent come from...and do a number of examples.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Evaluating Inverse Trigonometric Functions

In a 2 part video I work many examples of evaluating trigonometric expressions involving half and double angle identities.
Evaluating Trigonometry Expressions with Half and Double Angles Pt2
   • Evaluating Trigonometry Expressions w...  
Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Evaluating Trigonometry Expressions with Half and Double Angles Pt1

Part 1 of 2.  I introduce Standard Position Angles, Define Coterminal Angles, Quadrantal Angles, and the Radian Measure.
Standard Position Angles & Radians Part 2 
   • Standard Position Angles Pt2 Converti...  
Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Standard Position Angles & Radians Part 1

I work through 4 examples of working with angles in DMS notation.
Converting from decimal notation to DMS at 3:39
Converting from DMS to decimal notation at 7:55
Adding angles at 11:49
Finding a complimentary angle at 14:34

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/
If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Angle Measures in Degrees Minutes & Seconds DMS

Analyzing the time between high tides and the depth of the water, I make a function that models the tides and then calculate the safe hours for a ship to enter the port.

At minute 13:27 I wrote the inverse cosine of .667 or arccos(.667), that should be arccos(-.667). Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Water Depth Word Problem Modeled with Cosine Sine Function

I show the reciprocal relationship between the Cosine and Secant graph and Sine Cosecant graph.  This video includes two examples of graphing these inverse functions.  Note the reciprocal identities CSC(theta)=1/SIN(theta) and SEC(theta)=1/COS(theta) as I work through these examples.

If your teacher requires you to find points on the secant or cosecant graph, you may want to just use those functions in your table.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Graphing Secant & Cosecant w/ t-table

In a 2 part video I introduce the basic functions of Trigonometry ( Sine, Cosine, and Tangent ) and explain the design and use of the unit circle.  I also review the definition of a reference angle.  
* NOTE: The last angle is suppose to be 330 NOT 333:)  (Thank you to al those students that are paying attention:)

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Setting Up the Unit Circle Part 2

I introduce the Law of Sine and go over a couple of examples where there is one unique triangle.  I finish with an example of finding area of an oblique triangle.
NEW VERSION!!!     • Law of Sine Introduction Solving Obli...  
Applications of Law of Sine and Law of Cosine 
https://www.profrobbob.com/pre-calculus/law-of-sine-and-law-of-cosine

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Oblique Triangles Law of Sines READ DESCRIPTION:D

I derive two of the eight formulas of Product to Sum and Sum to Product and then work through 5 examples at 7:02 10:07 13:00 18:50 and 23:02
http://www.youtube.com/timedtext_vide...

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Product to Sum and Sum to Product Formulas

I go over many example of evaluating trigonometry functions in exact form using the unit circle.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Evaluating Trig Functions w/ Unit Circle Degrees & Radians

I work through some examples of verifying trig identities that require the use of sum & difference identities of Sine, Cosine, and Tangent
I was corrected that what I am trying to prove should not be within the body of the proof.  This implies it has already been assumed to be true.  So proofs should be shown like this example:
cos^2(x)(tan^2(x)+1)=1
Proof: 
cos^2(x)(tan^2(x)+1)=cos^2(x)*sec^2(x)
                                 =cos^2(x)(1/cos^2(x))
                                 =1

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Verifying Trigonometric Identities Involving Sum & Difference

In a 2 part video I work many examples of evaluating trigonometric expressions involving half and double angle identities.
Evaluating Trigonometry Expressions with Half and Double Angles Pt1 
   • Evaluating Trigonometry Expressions w...  

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Evaluating Trigonometry Expressions with Half and Double Angles Pt2

Using the Sum and Difference Identities, I do examples of evaluating trigonometric expressions that require the use of the sum and difference identities for sine, cosine, and tangent.
At the end of the example  of sin(195) (at 8:04) I say the denominator of the answer is 2 but 2*2 equals 4.  Sorry for the error.  There is an annotation correction, but you will not see it if you do not have Flash.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Sum and Difference Trigonometric Identities

Using the fundemental identities and the Pythagorean Identities, I go over multiple examples of verifying trigonometric identities. 

It is very important in proofs that you do not handle it like an equation moving terms and factors from side to side. 

NOTE from: Rick A
We should use the 'triple hyphen' to indicate an identity instead of an equation so students don't think your solving an equation.  I get this notion from recalling the textbooks from my high-school days.

I was corrected that what I am trying to prove should not be within the body of the proof.  This implies it has already been assumed to be true.  So proofs should be shown like this example:
cos^2(x)(tan^2(x)+1)=1
Proof: 
cos^2(x)(tan^2(x)+1)=cos^2(x)*sec^2(x)
                                 =cos^2(x)(1/cos^2(x))
                                 =1

Verifying Trigonometric Identities Part 2
   • Verifying Trigonometric Identities Pt2  
Verifying Trigonometric Identities Part 3
   • Verifying Trigonometric Identities Pt3  

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Verifying Trigonometric Identities Pt 1

Link to Part 1    • Right Triangle Trigonometry Part 1: F...  
I introduce evaluating trigonometric functions about a right triangle.  We will set up the trig ratios given a right triangle, and find missing angle measures, and sides of right triangles using the pythagorean theorm and the trig functions.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Right Triangle Trigonometry Part 2: Solving for Acute Angles

I introduce and prove the Fundamental Trigonomic Identities...the Quotient Identities, Reciprocal Identities, and the Pythagorian Identities.

I like this tip!!!
Darren Bonura:  My teacher taught us "No Co-Co" as in Cosine doesn't equal Cosecant. Just a helpful way to remember it. That way Cosine has to equal Secant and thus Sine equals Cosecant.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Fundamental Trigonometric Identities Intro & Proofs

I do two examples converting a point from rectangular to polar...then back to rectangular form.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Converting Coordinates between Polar and Rectangular Form

I introduce the concept of Cofunctions in Trigonometry and explain why and when they are equal.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Trigonometric Cofunctions

I work through 5 examples of verifying trigonometric identities that involve half angle and double angle identities.
I was corrected that what I am trying to prove should not be within the body of the proof.  This implies it has already been assumed to be true. So proofs should be shown like this example:
cos^2(x)(tan^2(x)+1)=1
Proof: 
cos^2(x)(tan^2(x)+1)=cos^2(x)*sec^2(x)
                                 =cos^2(x)(1/cos^2(x))
                                 =1

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Trigonometry Proofs Involving Half and Double Angles

I introduce the transformations you can apply to the six trigonomtric functions.  I then go over two basic examples of graphing sine with using t-tables.  Part 2 will be two more examples of graphing sine & cosine with more transformations using a t-table.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Graphing Sine & Cosine w/out a Calculator Pt 2

I introduce how to evaluate trig functions without knowing the actual angle measures.  With just enough information to determine what quadrant an angle is in and set up the reference triangle, we can find any trigonometric ratio.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Trigonometric Functions of Any Angle

In part 2 I show how to convert angles from degrees to radians and radians to degrees.  I then introduce the sixteen angles around what will be developed into the unit circle.  On the angle of 330 degrees, I said 330 but wrote 333.  It is 330:D

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Standard Position Angles Pt2 Converting Degrees and Radians

I work through a couple of examples of multiplying and dividing complex numbers in polar form Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Product & Quotient of Polar Complex Numbers

I go over examples of evaluating Linear Speed, Angular Speed, and finding Arc Length while measuring rotation using radians.
     In this video I keep saying Velocity matching language of textbooks I have used in the past, but since the measure of velocity also incorporates direction I should be saying speed.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Linear & Angular Speed Part 2

I should have written the restrictions as [0,2pi).  I do multiple examples of solving equations with trigonometric functions in them at 1:06 4:30 9:11 12:42 15:49 This videos only includes trig functions with single angles such as sinx as opposed to sin(4x).
Please help Close Caption this lesson
http://www.youtube.com/timedtext_vide...

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Trigonometric Equations Single Angle 0 to 2pi Restriction 5 Examples

In a 2 part video I introduce the basic functions of Trigonometry (Sine, Cosine, and Tangent) and explain how to develop the unit circle using 45-45-90 triangle and 30-60-90 triangles you learned in Geometry.  I also define reference angles.
Subscriber Tip: All S(in)tudents T(an)ake C(os)alculus (thanks Steve:)
Setting Up the Unit Circle Part 2 
   • Setting Up the Unit Circle Part 2  

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Setting up the Unit Circle Part 1 and Reference Angle

Using the unit circle I explain why Tangent and Cotangent have a period of Pi instead of 2Pi like the other trig functions.  I then graph the two parent functions discussing domain and range as well.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Intro Tangent & Cotangent Graphs

I explain how to raise complex numbers in polar form by very high powers by using De Moivre's Theorem.

The first example starts at 6:13

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

De Moivre's Theorem powers of Polar Complex Numbers

Using the fundemental identities and the Pythagorean Identities, I go over multiple examples of verifying trigonometric identities.

It is very important in proofs that you do not handle it like an equation moving terms and factors from side to side. 

I was corrected that what I am trying to prove should not be within the body of the proof.  This implies it has already been assumed to be true.  So proofs should be shown like this example:
cos^2(x)(tan^2(x)+1)=1
Proof: 
cos^2(x)(tan^2(x)+1)=cos^2(x)*sec^2(x)
                                 =cos^2(x)(1/cos^2(x))
                                 =1

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Verifying Trigonometric Identities Pt3

I introduce evaluating trigonometric functions about a right triangle.  We will set up the trig ratios given a right triangle, and find missing angle measures, and sides of right triangles using the pythagorean theorm and the trig functions.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class.
 Find free review test, useful notes and more at http://www.mathplane.com/ 
If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Right Triangle Trigonometry Part 1: Finding Missing Sides

I introduce and do examples of finding the area of oblique triangles using two sides and an includeds angle, as well as using Heron's formula when you know all three sides.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Area of oblique triangles SAS SSS Heron's Formula

Using the fundemental identities and the Pythagorean Identities, I go over multiple examples of verifying trigonometric identities.

It is very important in proofs that you do not handle it like an equation moving terms and factors from side to side. 

I was corrected that what I am trying to prove should not be within the body of the proof.  This implies it has already been assumed to be true.  So proofs should be shown like this example:
cos^2(x)(tan^2(x)+1)=1
Proof: 
cos^2(x)(tan^2(x)+1)=cos^2(x)*sec^2(x)
                                 =cos^2(x)(1/cos^2(x))
                                 =1
Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Verifying Trigonometric Identities Pt2

This lesson first starts with how to test for symmetry in a polar graph.
     Symmetry to the Polar Axis at 1:34
     Symmetry to the line Theta=pi/2 at 8:13
     Symmetry to the Pole at 10:38
Special Types of Graphs
     Circles at 13:13
     Limacons at 16:16  I explain how to recognize the 4 subcategories of Limacons which are Inner Loop, Cartiod, Dimpled, and Convex.
           EXAMPLE of graphing a Limacon with an inner loop at 20:29
     Rose Curve introduced at 34:10
            EXAMPLE with even number of petals at 38:01
            EXAMPLE with odd number of petals at 49:36
     Lemniscates introduced at 54:03
            LAST EXAMPLE at 55:14

Graphing Calculator Example at 26:50

My introductory video of Understanding Polar Coordinates    • Understanding Polar Coordinates   Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Graphing Polar Equations, Test for Symmetry & 4 Examples Corrected

I do two examples of Tangent and Cotangent that include multiple transformations with a t-table.  This video has two errors noted below which have annotation corrections in the video which you will see if you have Flash.

At minute 7:27 I say that the cot(0) is -1/0, that should be 1/0.

The very last point I mention at around 10:42 should have a y coordinate of -1 not 0.  Sorry for the small errors:)

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Tangent & Cotangent Graphs w/ Transformations

I do four examples to help you understand how to solve some of your word problems that require Law of Sine and/or Cosine.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Applications of Law of Sines and Cosines

I use the unit circle to graph 2 periods the basic sine and cosine functions to show how they relate to each other.  I also explain how the symmetry of these two graphs helps you to determine that the sine function is odd and the cosine function is even.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Understanding Basic Sine & Cosine Graphs

Using the fundemental identities and the Pythagorean Identities, I go over multiple examples of verifying trigonometric identities. 

It is very important in proofs that you do not handle it like an equation moving terms and factors from side to side. 

I was corrected that what I am trying to prove should not be within the body of the proof.  This implies it has already been assumed to be true.  So proofs should be shown like this example:
cos^2(x)(tan^2(x)+1)=1
Proof: 
cos^2(x)(tan^2(x)+1)=cos^2(x)*sec^2(x)
                                 =cos^2(x)(1/cos^2(x))
                                 =1
I reshot the intro with permanent corrections instead of just the annotations that are at the beginning of this video.    • Verifying Trigonometric Identities Pt 1  

Verifying Trigonometric Identities Part 2
   • Verifying Trigonometric Identities Pt2  
Verifying Trigonometric Identities Part 3
   • Verifying Trigonometric Identities Pt3  

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

I work through 8 examples of converting equations between rectangular and polar form.
Graphing Ellipses and Circles
   • Graphing Ellipses & Circles  
Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Converting Equations Between Polar & Rectangular Form

I introduce Polar Coordinate System.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Understanding Polar Coordinates

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/
If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Equation of Sine and Cosine from a Graph

I explain the relationhip between complex numbers in rectangular form and polar form.  I also do an example of converting back and forth between the two forms.
At time 9:57 I should say...Converting from Polar to Rectangular is very simple.  Converting from Rectangular to Polar requires you to think about the final theta measure.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

Complex Numbers in Polar Form

I do three examples of finding roots of complex numbers in polar form using De Moivre's Root Theorem.

Check out http://www.ProfRobBob.com/, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com/ If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage    / profrobbob  

De Moivre's Theorem Roots of Polar Complex Numbers

I introduce the transformations you can apply to the six trigonomtric functions.  I then go over two basic examples of graphing sine with using t-tables.  Part 2 will be two more examples of graphing sine & cosine with more transformations using a t-table.  Part 2    • Graphing Sine & Cosine w/out a Calcul...  

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Ambiguous Case for Law of Sines, Please read description

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Trigonometry #35

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