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If f(x)=cot^(-1)(cos2x)^(1//2), then f'(...

If `f(x)=cot^(-1)(cos2x)^(1//2)`, then `f'(pi//6)` is :

A

`(2/3)^(1/2)`

B

`(1/3)^(1/2)`

C

`3^(1/2)`

D

`6^(1/2)`

Text Solution

Verified by Experts

The correct Answer is:
A
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