Question Number 65788 by ~ À ® @ 237 ~ last updated on 04/Aug/19
$${Explicit}\:\:\:{f}\left({a}.{b}.{c}\right)=\int_{\mathrm{0}} ^{\frac{\pi}{\mathrm{2}}} \:\:\frac{{sec}\left({x}−{a}\right)}{{b}.{cosx}\:+\:{c}.{sinx}}\:{dx} \\ $$$$ \\ $$
Explicit-f-a-b-c-0-pi-2-sec-x-a-b-cosx-c-sinx-dx-