Continuity and DifferentiabilityHard

Question

If y = sinn x cos nx, then dy/dx equals-

Options

A.n sinn-1 x. cos (n + 1) x
B.n sinn-1 x. sin (n + 1) x
C.n sinn-1 x. cos (n − 1) x
D.n sinn-1 x. cos x

Solution

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