I was trying to evaluate double integral: $\int_{0}^{\pi}dx\int_{x}^{\pi} \frac{\sin y}{y} dy$
I don't know what to do, from double integral calculator the answer is $2$. I checked indefinite integral from it and it is $\operatorname*{Si}(x)+C$. I tried to do it with polar form, but I get nothing interesting.
How to evaluate such integral?