Very nice integral and answer with Catalan’s constant

Integral x/tanx from 0 to pi/4

[rudrasharma]

I have been searching for the kind of channels for Maths which provides calculus problems at this level. Literally this is the only channel i HV found. Thank you so much sir!!

[wuyqrbt]

At the first glance, it seems it's short video, but it's not!!
Great, thank you dear *MMI* ❤️

[Noam_.Menashe]

This reminds me of integral x/cotx from 0 to pi/4 which took me over a week to solve a while back.

[jfcrow]

Integrate to pi/2. Makes more sense from graph of function.