`int (dx)/(e^x + e^-x)`

A

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

B

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

C

`log(e^(x)-e^(-x))+c`

D

`log(e^(x)+e^(-x))+c`

Verified by Experts

The correct Answer is:

B

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