If `f(x) = (cos x+i sin x) (cos 2x+i sin 2x) (cos 3x + i sin 3x) ... (cos nx + i sin nx)` = a
386 views · Published 12 October 2018 · 3:10 · Indexed 30 September 2026
Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW If `f(x) = (cos x+i sin x) (cos 2x+i sin 2x) (cos 3x + i sin 3x) ... (cos nx + i sin nx)` = and `f(1) = 1, then f''(1)` is equal to
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