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Trigonometric Identities

In mathematics, trigonometric identities are equalities that involve trigonometric functions that are true for every single value of the occurring variables. Geometrically, these are identities involving certain functions of one or more angles. These are distinct from triangle identities, which are identities involving both angles and side lengths of a triangle. Only the former are covered in this article.

These identities are useful whenever expressions involving trigonometric functions need to be simplified. An important application is the integration of non-trigonometric functions: a common technique involves first using the substitution rule with a trigonometric function, and then simplifying the resulting integral with a trigonometric identity.
- Wikipedia



Basic Identities
RF Cafe: Trig Identity
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RF Cafe: Trig Identity RF Cafe: Trig Identity
RF Cafe: Trig Identity RF Cafe: Trig Identity
RF Cafe: Trig Identity RF Cafe: Trig Identity
Power Identities
RF Cafe: Trig Identity RF Cafe: Trig Identity
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RF Cafe: Trig Identity

 

RF Cafe: Trig Identity
RF Cafe: Trig Identity
RF Cafe: Trig Identity
RF Cafe: Trig Identity
Half-Angle Identities
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RF Cafe: Trig Identity RF Cafe: Trig Identity
RF Cafe: Trig Identity RF Cafe: Trig Identity
RF Cafe: Trig Identity RF Cafe: Trig Identity
RF Cafe: Trig Identity
RF Cafe: Trig Identity
RF Cafe: Trig Identity
RF Cafe: Trig Identity
Euler's Identities
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RF Cafe: Trig Identity     RF Cafe: Trig Identity     RF Cafe: Trig Identity

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