Question: A 2. Using cos(a + b) = cos(a) cos(b) sin(a) sin(b) and cos(a b) = cos(a) cos(b) + sin(a) sin(b) show, for n #

A 2. Using cos(a + b) = cos(a) cos(b) sin(a) sin(b) and 

A 2. Using cos(a + b) = cos(a) cos(b) sin(a) sin(b) and cos(a b) = cos(a) cos(b) + sin(a) sin(b) show, for n # m, that: sin sin dz = 0 P.

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