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View Full Version : Use trigonometric identities to verify

Tcol55006
Mar 18, 2011, 06:17 AM
cos(u+v)cos(u-v)=cos^2u-sin^2v
Unknown008
Mar 18, 2011, 06:34 AM
Use the identities:

\cos(A+B) = \cos A\cos B - \sin A\sin B

\cos(A-B) = \cos A\cos B + \sin A\sin B