Trigonometry

The foundations of Trigonometry from The Khan Academy.
3 reviews
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Trigonometry

The foundations of Trigonometry from The Khan Academy.
3 reviews

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COURSE DESCRIPTION

Videos on trigonometry. Watch the 'Geometry' playlist first if you have trouble understanding the topics covered here.
    • Over 32 lectures and 5 hours of content!

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CURRICULUM

  • 1
    Basic Trigonometry
    08:44
    An introduction to trigonometric functions: sine, cosine, and tangent.
  • 2
    Basic Trigonometry II
    05:54
    Another example of figuring out the sine, cosine, and tangent of an angle in a right triangle
  • 3
    Radians and degrees
    09:55
    What a radian is. Converting radians to degrees and vice versa.
  • 4
    Using Trig Functions
    10:02
    Using Trigonometric functions to solve the sides of a right triangle
  • 5
    Using Trig Functions Part II
    08:37
    A couple of more examples of using Trig functions to solve the sides of a triangle.
  • 6
    The unit circle definition of trigonometric function
    09:07
    Using the unit circle to extend the SOH CAH TOA definition of the basic trigonometric functions.
  • 7
    Unit Circle Definition of Trig Functions
    10:11
    Using the unit circle to define the sine, cosine, and tangent functions
  • 8
    Graph of the sine function
    07:44
    Using the unit circle definition of the sine function to make a graph of it.
  • 9
    Graphs of trig functions
    10:16
    Exploring the graphs of trig functions
  • 10
    Graphing trig functions
    09:53
    Analyzing the amplitude and periods of the sine and cosine functions.
  • 11
    More trig graphs
    05:12
    Determining the equations of trig functions by inspecting their graphs.
  • 12
    Determining the equation of a trigonometric function
    09:51
    Determining the amplitude and period of sine and cosine functions.
  • 13
    Trigonometric Identities
    09:10
    Introduction to trigonometric identities
  • 14
    Proof: sin(a+b) = (cos a)(sin b) + (sin a)(cos b)
    09:48
    Proof of the trig identity sin(a+b) = (cos a)(sin b) + (sin a)(cos b)
  • 15
    Proof: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)
    09:22
    Proof of the trig identity: cos(a+b) = (cos a)(cos b)-(sin a)(sin b)
  • 16
    Trig identities part 2 (parr 4 if you watch the proofs)
    09:56
    More playing around with trig identities
  • 17
    Trig identies part 3 (part 5 if you watch the proofs)
    08:35
    Continuation of the playing around with trig identities
  • 18
    Trigonometry word problems (part 1)
    09:56
    The first part of a problem when the captain of a ship goes off track.
  • 19
    Trigonometry word problems (part 2)
    02:51
    The second part of the problem of the off-track ship captain
  • 20
    Law of cosines
    09:26
    Introduction to the law of cosines to solve for a side of a triangle when 2 sides and an angle are known.
  • 21
    Navigation Word Problem
    08:00
    Trigonometry problem involving two ships colliding.
  • 22
    Proof: Law of Sines
    06:32
    A simple proof of the Law of Sines
  • 23
    Ferris Wheel Trig Problem
    07:20
    Trigonometry problems dealing with the height of two people on a ferris wheen
  • 24
    Ferris Wheel Trig Problem (part 2)
    09:07
    Part 2 of the ferris wheel problems. Graph of h(t)=9-8cos(18t)
  • 25
    Fun Trig Problem
    10:01
    A trig problem involving the quadratic equation.
  • 26
    Polar Coordinates 1
    10:20
    Introduction to polar coordinates
  • 27
    Polar Coordinates 2
    09:31
    Conversion from Cartesian to Polar Coordinates
  • 28
    Polar Coordinates 3
    07:37
    Converting between Cartesian and Polar functions
  • 29
    Inverse Trig Functions: Arcsin
    10:36
    Introduction to the inverse trig function arcsin
  • 30
    Inverse Trig Functions: Arctan
    10:06
    Understanding the arctan or inverse tangent function.
  • 31
    Inverse Trig Functions: Arccos
    13:38
    Understanding the inverse cosine or arccos function
  • 32
    Trigonometry Identity Review/Fun
    11:07
    Revisiting the proofs of some trigonometry identities.

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REVIEWS

  • 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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