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How to Use the sine, cosine & tangent trigonometric functions

May 25, 2010 05:57 PM
Trigonometry diagram illustrating a triangle with sides labeled 3, 4, and 5, and the angle marked as θ, along with the mnemonic 'soh cah toa'.

New to trigonometry? Learn how to calculate cosine, sine and tangent with this lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to work with the basic trigonometric functions.

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