Question

Suppose that f is a function such that f(cos x) = cos 17x . Which one of the following functions g has the property that g(sin x) = sin 17x . 

(A) g(x) = f(√1-x²)  (B)  g(x) = f(x - π/4)   (C) g(x) = √1-x²  (D) g(x) = f(x)

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