Mathwords: Double Angle Identities

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Double Angle Identities
Double Number Identities

Trig identities that show how to find the sine, cosine, or tangent of twice a given angle.

Double Angle Identities

See also

Half angle identities

this page updated 15-jul-23
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
Copyright © 2000 by Bruce Simmons
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