Trigonometry

The foundations of Trigonometry from The Khan Academy.
Instructed by The Khan Academy
  • Lectures 32
  • Video 5 Hours
  • Skill level all level
  • Languages English
  • Includes Lifetime access
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Course Description

Videos on trigonometry. Watch the 'Geometry' playlist first if you have trouble understanding the topics covered here.

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  • Over 32 lectures and 5 hours of content!

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Curriculum

08:44
An introduction to trigonometric functions: sine, cosine, and tangent.
05:54
Another example of figuring out the sine, cosine, and tangent of an angle in a right triangle
09:55
What a radian is. Converting radians to degrees and vice versa.
10:02
Using Trigonometric functions to solve the sides of a right triangle
08:37
A couple of more examples of using Trig functions to solve the sides of a triangle.
09:07
Using the unit circle to extend the SOH CAH TOA definition of the basic trigonometric functions.
10:11
Using the unit circle to define the sine, cosine, and tangent functions
07:44
Using the unit circle definition of the sine function to make a graph of it.
10:16
Exploring the graphs of trig functions
09:53
Analyzing the amplitude and periods of the sine and cosine functions.
05:12
Determining the equations of trig functions by inspecting their graphs.
09:51
Determining the amplitude and period of sine and cosine functions.
09:10
Introduction to trigonometric identities
09:48
Proof of the trig identity sin(a+b) = (cos a)(sin b) + (sin a)(cos b)
09:22
Proof of the trig identity: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)
09:56
More playing around with trig identities
08:35
Continuation of the playing around with trig identities
09:56
The first part of a problem when the captain of a ship goes off track.
02:51
The second part of the problem of the off-track ship captain
09:26
Introduction to the law of cosines to solve for a side of a triangle when 2 sides and an angle are known.
08:00
Trigonometry problem involving two ships colliding.
06:32
A simple proof of the Law of Sines
07:20
Trigonometry problems dealing with the height of two people on a ferris wheen
09:07
Part 2 of the ferris wheel problems. Graph of h(t)=9-8cos(18t)
10:01
A trig problem involving the quadratic equation.
10:20
Introduction to polar coordinates
09:31
Conversion from Cartesian to Polar Coordinates
07:37
Converting between Cartesian and Polar functions
10:36
Introduction to the inverse trig function arcsin
10:06
Understanding the arctan or inverse tangent function.
13:38
Understanding the inverse cosine or arccos function
11:07
Revisiting the proofs of some trigonometry identities.

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Reviews

Average Rating
4.3
Details
  1. 5 Stars
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    • Chris Yarrison

    Good review

    I was looking for a refresher, and this is a good one. However, I would not recommend it to someone learning trig for the first time.

    • Andreu Ortin

    Trigonometria

    Vídeo tutorials de trigonometria.

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