Question Number 124062 by Bird last updated on 30/Nov/20
$${find}\:\int_{\frac{\pi}{\mathrm{2}}} ^{\frac{\pi}{\mathrm{4}}} \:\frac{{sin}\left({nx}\right)}{{sin}^{{n}} \left({x}\right)}{dx}\:\:\:\left({n}\:{natural}\right) \\ $$
find-pi-2-pi-4-sin-nx-sin-n-x-dx-n-natural-