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Let cos(2 tan^(-1) x)=1/2 then the value...

Let `cos(2 tan^(-1) x)=1/2` then the value of x is

A

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

B

`pmsqrt(3)`

C

`sqrt(3)-1`

D

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

Text Solution

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The correct Answer is:
D
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