Difference between revisions of "Trigonometric identities"
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(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.
