Difference between revisions of "Trigonometric identities"
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| + | == Reciprocal Identities == | ||
| + | |||
| + | == Pythagorean Identities == | ||
*<math>\displaystyle \sin^2x + \cos^2x = 1</math> | *<math>\displaystyle \sin^2x + \cos^2x = 1</math> | ||
*<math>\displaystyle 1 + \cot^2x = \csc^2x</math> | *<math>\displaystyle 1 + \cot^2x = \csc^2x</math> | ||
*<math>\displaystyle \tan^2x + 1 = \sec^2x</math> | *<math>\displaystyle \tan^2x + 1 = \sec^2x</math> | ||
| + | |||
| + | == Double Angle Identities == | ||
| + | |||
| + | == Even-Odd Identities == | ||
| + | |||
| + | == Other Identities == | ||
| + | |||
*<math>|1-e^{i\theta}|=2\sin\frac{\theta}{2}</math> | *<math>|1-e^{i\theta}|=2\sin\frac{\theta}{2}</math> | ||
Revision as of 22:53, 23 June 2006
Trigonometric identities are used to manipulate trig equations in certain ways. Here is a list of them:
Contents
Reciprocal Identities
Pythagorean Identities
Double Angle Identities
Even-Odd Identities
Other Identities
This page is incomplete--if you know of a trigonometric identity, add it.
