# Trigonometric functions

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Revision as of 18:28, 11 June 2009 by A WASSERMANN (talk | contribs)

The well known trigonometric functions can be visualized on the circle of radius 1. See http://en.wikipedia.org/wiki/Trigonometric_functions for the definitions.

**Tangent**: [math]\tan x = \frac{\sin x}{\cos x}[/math]**Cotangent**: [math]\cot x = \frac{\cos x}{\sin x}[/math]**Secant**: [math]\sec x = \frac{1}{\cos x}[/math]**Cosecant**: [math]\sec x = \frac{1}{\sin x}[/math]