Question Number 144720 by mnjuly1970 last updated on 28/Jun/21
$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:.....\mathrm{calculus}..... \\ $$$$\: \\ $$$$\Omega\::=\:\int_{\mathrm{0}} ^{\:\infty} \frac{{sech}\left(\pi{x}\right)}{\mathrm{1}+\mathrm{4}{x}^{\:\mathrm{2}} }\:{dx}\:\overset{?} {=}\frac{\mathrm{1}}{\mathrm{2}}\:\mathrm{Ln}\left(\mathrm{2}\right) \\ $$$$ \\ $$$$ \\ $$
Answered by phanphuoc last updated on 28/Jun/21
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