If sec^(-1) ((1+x)/(1-y))=a, then (dy)/(...

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

A

`(y-1)/(x+1)`

B

`(y+1)/(x-1)`

C

`(x-1)/(y-1)`

D

`(x-1)/(y+1)`

Verified by Experts

The correct Answer is:

A

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