# Half Angle Formulas

## Derivation of sine and cosine formulas for half a given angle.

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## Half Angle Formulas

by CK-12 //at grade
Using identities to derive more half angle formulas
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## Half-Angle Formulas

by CK-12 //at grade
Half Angle Formulas Interactive
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## Half Angle Identities

by CK-12 //at grade
Uses the half-angle identities to determine values of functions.
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