Difference between revisions of "Trigonometric function"
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Revision as of 01:13, November 16, 2008
Trigonometric functions are mathematical functions which were traditionally derived from trigonometry, the study of the triangle. Many of these functions have been extended in definition beyond the real numbers to the complex plane using analytic extension (Taylor series). The most basic trigonometric functions are:
as well as their inverses:
Variants of these functions form the hyperbolic functions.