ax+b(sec(tan^(-1)x))=c and ay+b(sec(tan^...

`ax+b(sec(tan^(-1)x))=c and ay+b(sec(tan^(-1)y))=c`
The value of `(x+y)/(1-xy)` is

A

`(2ab)/(a^(2)-b^(2))`

B

`(2ac)/(a^(2)+c^(2))`

C

`(2ab)/(a^(2)+b^(2))`

D

`(2ac)/(a^(2)-c^(2))`

Verified by Experts

The correct Answer is:

D

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