0 votes 0 votes If $f*(x)$ is the complex conjugate of $f(x)=\cos(x) + i\: \sin(x)$, then for real $a$ and $b$, $\int _{a}^{b}f*\left ( x \right )f\left ( x \right )$ is $ALWAYS$ positive negative real imaginary Calculus gate2014 calculus definite-integrals + – Milicevic3306 asked Mar 25, 2018 recategorized Mar 14, 2021 by Lakshman Bhaiya Milicevic3306 7.9k points answer See all 0 reply