calcilate-U-n-0-sin-nx-e-x-1-dx-

Question Number 93636 by abdomathmax last updated on 14/May/20

$${calcilate}\:{U}_{{n}} =\int_{\mathrm{0}} ^{\infty} \:\:\frac{{sin}\left({nx}\right)}{{e}^{{x}} −\mathrm{1}}{dx} \\ $$$$ \\ $$