If cot^(-1)x+cot^(-1)y=cot^(-1)c," then ...

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

A

`(x-c)/(y-c)`

B

`(c-y)/(x-c)`

C

`(x-c)/(c-y)`

D

`(y+c)/(c+y)`

Verified by Experts

The correct Answer is:

B

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