Question Number 42502 by maxmathsup by imad last updated on 26/Aug/18
$${calculate}\:{A}_{{n}} =\:\int_{\mathrm{0}} ^{\mathrm{2}\pi} \:\:\frac{{cos}\left({nx}\right)}{{cosx}\:+{sinx}}{dx}\:\:{with}\:{n}\:{from}\:{N} \\ $$
calculate-A-n-0-2pi-cos-nx-cosx-sinx-dx-with-n-from-N-