यदि 2cos^(-1)sqrt((1+x)/(2))=(pi)/(2) तो...

यदि `2cos^(-1)sqrt((1+x)/(2))=(pi)/(2)` तो `x=`

A

1

B

0

C

`-(1)/(2)`

D

`(1)/(2)`.

Verified by Experts

The correct Answer is:

B

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