JEE Main 20244 Apr, Evening shiftMathematicsEasyIntegral Calculus369× since 2002If the value of the integral ∫−11cosαx1+3xdx\int\limits_{-1}^1 \frac{\cos \alpha x}{1+3^x} d x−1∫11+3xcosαxdx is 2π\frac{2}{\pi}π2.Then, a value of α\alphaα isAOption A. π2\frac{\pi}{2}2πBOption B. π4\frac{\pi}{4}4πCOption C. π3\frac{\pi}{3}3πDOption D. π6\frac{\pi}{6}6πCheckSkip · show solution
