The unit circle definition of sine, cosine, and tangent
Learn how the trigonometric ratios are extended to all real numbers using algebra. Start solving simple problems that involve this new definition of the trigonometric functions.
This course contains 7 segments:
Introduction to radians
Learn about radians, which are the official unit of measurement for angles in algebra (in contrast to degrees, which are used in geometry).
The unit circle definition of sine, cosine, and tangent
Learn about the ingenious way in which we define the trigonometric functions for any real number.
The graphs of sine, cosine, and tangent
Learn how the graphs of y=sin(θ), y=cos(θ), and y=tan(θ) look, using the unit circle definition of the functions.
Basic trigonometric identities
Learn about very useful trigonometric identities that arise by considering different properties of the unit circle definition.
Trigonometric values of special angles
Learn how to find the trigonometric values of some special angles without the use of a calculator.
The Pythagorean identity
Prove the Pythagorean trigonometric identity for all real numbers and use it in order to solve problems.
Long live Tau
Watch videos by Sal and Vi that discuss the ongoing battle between the more popular Pi (π=3.14..) and its more qualified rival Tau (τ=6.28...).
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Rating | Not enough ratings |
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Length | 7 segments |
Starts | On Demand (Start anytime) |
Cost | Free |
From | Khan Academy |
Download Videos | On all desktop and mobile devices |
Language | English |
Subjects | Mathematics |
Tags | Math Trigonometry |
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Rating | Not enough ratings |
---|---|
Length | 7 segments |
Starts | On Demand (Start anytime) |
Cost | Free |
From | Khan Academy |
Download Videos | On all desktop and mobile devices |
Language | English |
Subjects | Mathematics |
Tags | Math Trigonometry |
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