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If Cos ^(-1) (( x ^(2) - y ^(2))/(x ^(2)...

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

A

` y/x`

B

`x/y`

C

`(x ^(2))/( y ^(2))`

D

`(y ^(2))/( x ^(2))`

Text Solution

Verified by Experts

The correct Answer is:
A
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