Sum and Difference Formula sin(A+B) = sin A cos B + sin B cos A sin(AB)=sin A cos B - sin B cos A cos(A + B) = cos A cos B - sin A sin B cos(A-B) = cos A cos B + sin A sin B Double Angles sin20=2sinOcc cos 20 = cos = 2 cos 1. Find the general solution to the following equations: a) tane -3 (Value: 2) =- =1- b) sin + sin 0 - 2 = 0 (Value: 3) a) cos 20-1 = 0 (Value: 3)