a hard integral?

[@holyshit922]

i would use integration by parts and then substitutions like u = pi/2 - x and this is exactly the same way as mine

[@cristobaldona1685]

Thank you sir! It was very useful, very clear explanation!

[@bm8524]

Thank you so much! This helped a lot

[@Mediterranean81]

π ln (2) / 2

[@ahmedsabri-ng2xx]

nice