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Let f(x) = xsinα/(x + 1) x ≠1 f ≠ I, f(x) ≠ 0. Then what values of sinα is f(f(x)) = x?

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Let f(x) = xsinα/(x + 1) x ≠1 f ≠ I, f(x) ≠ 0. Then what values of sinα is f(f(x)) = x?

(a) √3

(b) √2

(c) 1

(d) -1

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The correct option (d) -1

Explanation:

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