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If f(x) = (cos x + i sin x)(cos 3x + i s...

If `f(x) = (cos x + i sin x)(cos 3x + i sin 3x) ….(cos (2n - 1)x + i(sin(2n - 1)x)`, then `f^(11)(x)` is

A

`n^2f(x) `

B

`-n^(4)f(x)`

C

`-n^2f(x)`

D

`n^4f(x)`

Text Solution

Verified by Experts

The correct Answer is:
B
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