Sum to Product Identity Formula - Trigonometric Identities

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)

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