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The differential coeffcient of cot^(-1...

The differential coeffcient of
`cot^(-1)(sqrtcos2x)at x = (pi)/(6)` is

A

`sqrt((2)/(3))`

B

`sqrt((1)/(3))`

C

`sqrt(3)`

D

`sqrt(6)`

Text Solution

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The correct Answer is:
A
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