# Sum to Product Trigonometry Identities Calculator

Trigonometry identities calculator to rewrite and evaluate sums of sines and/or cosines as products.

## Sum to Product Trigonometry

**Formula Used: **

sinu + sinv = 2 x sin(u+v/2) x cos(u-v/2)

sinu - sinv = 2 x cos(u+v/2) x sin(u-v/2)

cosu + cosv = 2 x cos(u+v/2) x cos(u-v/2)

cosu - cosv = -2 x sin(u+v/2) x sin(u-v/2)

Sum to product trigonometry identities calculation is made easier here.

Product to sum trigonometry identities calculation is made easier here.