# Product to Sum Trigonometry Identities Calculator

Trigonometry calculator to rewrite and evaluate the trigonometric functions using power reduction formulas. The power reduction formulas are obtained by solving the second and third versions of the cosine double-angle formula.

## Product to Sum Trigonometry

• Enter U Angle

• Enter V Angle

•
• Result:

Formula Used:

sinusinv = 1/2 [ cos(u-v) - cos(u+v)]
cosucosv = 1/2 [ cos(u-v) + cos(u+v)]
sinucosv = 1/2 [ sin(u+v) + sin(u-v)]
cosusinv = 1/2 [ sin(u+v) - sin(u-v)]

Product to sum trigonometry identities calculation is made easier here.