## anonymous 5 years ago Evaluate the integral: 23e^xcos2xdx

$23\int\limits_{?}^{?}e ^{xcos2x}dx$ then you do the derivative of xcos2x $f \prime(x) = x(-2\sin2x)+\cos2x$ then put it all into one: $23e ^{xcost2x}/(-2xsin2x+\cos2x)$ insert limits if you like...