d/(dx)cot^(-1)x का मान है...

`d/(dx)cot^(-1)`x का मान है

A

`1/(1+x^2)`

B

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

C

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

D

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

लिखित उत्तर

Verified by Experts

The correct Answer is:

B

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