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There exists a positive real number x sa...

There exists a positive real number x satisfying `cos(tan^(-1)x)=x`. Then the value of `"cos"^(-1)((x^(2))/2)` is

A

`(pi)/10`

B

`(pi)/5`

C

`(2pi)/5`

D

`(4pi)/5`

Text Solution

Verified by Experts

The correct Answer is:
C
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