1.

If 2n+1 x = π, then 2n cos x cos 2x cos 22x ... cos 2n-1 x=1(a) -1(b) 1(c) 1/2(d) None of these

Answer» If 2n+1 x = π, then 2n cos x cos 2x cos 22x ... cos 2n-1 x=1

(a) -1

(b) 1

(c) 1/2

(d) None of these


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