Hello,

I want to solve this question $\displaystyle\int_0^\infty \frac{\cos{(ax)}}{\cosh{(b)}+\cosh{(x)}} dx$ where a is real and b>0.

I put this question in online integral calculator and WolframAlpha computational intelligence, But both of these calculators couldn't understand my problem.

If any member of MHF knows answer to this question, he may reply with correct answer.