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If y=cos^(-1)((x-x^(-1))/(x+x^(-1))), th...

If `y=cos^(-1)((x-x^(-1))/(x+x^(-1))),` then `(dy)/(dx)` is

A

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

B

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

C

`1/(1+x^2)`

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
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