Question Number 35045 by math khazana by abdo last updated on 14/May/18
$${find}\:{f}\left({x}\right)=\int_{\mathrm{0}} ^{\infty} \:\:\:\frac{{arctan}\left({xt}\right)}{\mathrm{1}+{t}^{\mathrm{2}} }{dt}\:\:. \\ $$
find-f-x-0-arctan-xt-1-t-2-dt-