# Difference between revisions of "Trigonometric identities"

Mysmartmouth (talk | contribs) |
(Angle Addition formulae, prosthaphaersis heading add) |
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*<math>\displaystyle \tan^2x + 1 = \sec^2x</math> | *<math>\displaystyle \tan^2x + 1 = \sec^2x</math> | ||

− | == | + | == Angle Addition Identities == |

+ | *<math>\displaystyle \sin \theta \cos \gamma + \sin \gamma \cos \theta = \sin \left(\theta+\gamma\right)</math> | ||

+ | *<math>\displaystyle \cos \theta \cos \gamma - \sin theta \sin gamma = \cos \left(\theta+\gamma\right)</math> | ||

+ | *<math>\displaystyle \frac{\tan \theta + \tan gamma}{1-\tan\theta\tan\gamma}=\tan\left(\theta+\gamma\right)</math> | ||

== Even-Odd Identities == | == Even-Odd Identities == | ||

+ | |||

+ | ==Prosthaphaersis Indentities== | ||

+ | (Otherwise known as sum-to-product identities) | ||

== Other Identities == | == Other Identities == |

## Revision as of 06:11, 24 June 2006

Trigonometric identities are used to manipulate trig equations in certain ways. Here is a list of them:

## Contents

## Reciprocal Identities

## Pythagorean Identities

## Angle Addition Identities

## Even-Odd Identities

## Prosthaphaersis Indentities

(Otherwise known as sum-to-product identities)

## Other Identities

This page is incomplete--if you know of a trigonometric identity, add it.