cos^(- 1)sqrt((sqrt(1+x^2)+1)/(2sqrt(1+x...

`cos^(- 1)sqrt((sqrt(1+x^2)+1)/(2sqrt(1+x^2)))`

A

`(1)/(1+x^(2))`

B

`(-1)/(2(1+x^(2))`

C

`(1)/(2(1+x^(2))`

D

`(1)/(2)`

Verified by Experts

The correct Answer is:

C

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