# Integral of 1/sinh^2(x/2)

Hi dear members,
I have a problem with the following integral:

Integral 1/sinh^2(x/2) from -inf to +inf =-2 coth(x/2)

must I consider it as a principal value integral???

Thank you

dextercioby
Homework Helper
If you're integrating wrt x, you can't have x in the RHS.

pwsnafu