`intx/(1+x^4)\ dx`

A

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

B

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

C

`cot^(-1)(x^(2))+c`

D

`tan^(-1)(x^(2))+c`

Verified by Experts

The correct Answer is:

B

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