Question: please help me solve this. show soluction 7.) if f(x) = cos7x + 2sin4x -2x , find a) 40 b) f(Z)

please help me solve this. show soluction

7.) if f(x) = cos7x + 2sin4x -2x , find a) 40

7.) if f(x) = cos7x + 2sin4x -2x , find a) 40 b) f(Z)

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