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

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

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
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