関連ワード:  antiderivative of sin x 3    antiderivative of x sin 3x    antiderivative of sin 3 x dx    integral of sin x 3    integral of sin x 3 dx    integral of sin x 3 2    integral of sin x 3 from 0 to pi    antiderivative of sin x 2 3    integration of x sin 3x    integration of x sin 3x dx