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Given the f (n theta) = ( 2 sin 2 theta)...

Given the `f (n theta) = ( 2 sin 2 theta)/( cos 2 theta - cos 4 n theta) and f (theta) + f ( 2 theta) + f (3 theta) +…+ f (n theta) = (sin gamma thea)/(sin theta sin mu theta) ` the the value of `mu - gamma ,` is

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