Trigonometric functions

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Revision as of 16:54, 22 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]\displaystyle{ \tan x = \frac{\sin x}{\cos x} }[/math]
  • Cotangent: [math]\displaystyle{ \cot x = \frac{\cos x}{\sin x} }[/math]
  • Secant: [math]\displaystyle{ \sec x = \frac{1}{\cos x} }[/math]
  • Cosecant: [math]\displaystyle{ \csc x = \frac{1}{\sin x} }[/math]