Which one will be the correct option co...

Which one will be the correct option
`cot^-1((sqrt(1+x^2)-1)/x)=`

A

`cot^(-1)x`

B

`pi/2-1/2tan^(-1)x`

C

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

D

`pi/2-1/2cot^(-1)x`

Verified by Experts

The correct Answer is:

B

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