If cos^(-1) ((x^(2) -y^(2))/( x^(2)+y^(...

If ` cos^(-1) ((x^(2) -y^(2))/( x^(2)+y^(2)))=a ,then (dy)/(dx) =`

A

`-(x)/(y)`

B

`-(y)/(x)`

C

`(y)/(x)`

D

`(x)/(y)`

Verified by Experts

The correct Answer is:

C

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