Trig Functions Given On Quiz

Sum & Difference Formulas

sin(u + v) = sin u cos v + cos u sin v

sin(u - v) = sin u cos v - cos u sin v

cos(u + v) = cos u cos v – sin u sin v

cos(u – v) = cos u cos v + sin u sin v

Double-Angle Formulas

sin 2u = 2 sin u cos u

cos 2u = cos² u – sin² u  = 2 cos² u  - 1  = 1 – 2 sin² u

Power Reducing Formulas

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Product-to-Sum Formulas