This question already has an answer here:

How to evaluate $$\int_0^\infty \frac{\ln(x^2+1)}{x^2+1} \mathrm{d}x$$ using complex analysis?

I've spent ages trying to think of some clever contour integral which will give it, but I can't seem to get anywhere. Any hints would be appreciated.


merged by Eric Naslund Apr 24 '13 at 14:34

This question was merged with Evaluating $\int_0^{\infty}\frac{\ln(x^2+1)}{x^2+1}dx$ because it is an exact duplicate of that question.

  • $\begingroup$ Actually, the other question is a duplicate of this one. But the other question did get answers sooner than this one... $\endgroup$ – TMM Apr 24 '13 at 10:11