Question Number 144946 by mnjuly1970 last updated on 30/Jun/21
$$ \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\boldsymbol{\phi}\::=\:\int_{\:\mathrm{0}} ^{\:\:\frac{\pi}{\mathrm{2}}} \left(\frac{\:\mathrm{x}}{\mathrm{cot}\:\left(\:\mathrm{x}\:\right)}\:\right)^{\:\mathrm{3}} \mathrm{dx}=? \\ $$$$ \\ $$