int(1)/((e^(x)+e^(-x))^(2))dx=...

`int(1)/((e^(x)+e^(-x))^(2))dx=`

A

a) `-(1)/(2(e^(2x)+1))+c`

B

b) `(1)/(2(e^(2x)+1))+c`

C

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

D

d) None of these

Verified by Experts

The correct Answer is:

A

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