MathematicsMedium210×since 2002Q3338The value of ∫−ππcos21+axdx, a>0,\int\limits_{ - \pi }^\pi {{{{{\cos }^2}} \over {1 + {a^x}}}dx,\,\,a > 0,}−π∫π1+axcos2dx,a>0, isAa πa\,\piaπBπ2{\pi \over 2}2πCπa{\pi \over a}aπD2π{2\pi }2πCheck answerSkip