Question: Using Euler's equation (ei(t)eix ely) = prove (1) sind+sing = 2sin(x+y). cos (2) Sinx cosy = (3) cosa cosy = sin(x+y)+sin(xy) 2 (xy) cos(x+y)-cos(xy)

Using Euler's equation (ei(t)eix ely) = prove (1) sind+sing = 2sin(x+y). cos

Using Euler's equation (ei(t)eix ely) = prove (1) sind+sing = 2sin(x+y). cos (2) Sinx cosy = (3) cosa cosy = sin(x+y)+sin(xy) 2 (xy) cos(x+y)-cos(xy)

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