If y = tan^(-1) x + sec^(-1) x + cot^(-1...

If `y = tan^(-1) x + sec^(-1) x + cot^(-1) x + "cosec"^(-1)x`,
then `(dy)/(dx)` is equal to

A

`(x^(2)-1)/(x^(2)+1)`

B

`pi`

C

0

D

1

Verified by Experts

The correct Answer is:

C

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