関連ワード:  integration of x sin 3x dx    integration of x sin 3x dx is equal to    integration of cos x sin 3x dx    integration of x 2 sin 3x dx    integration of x 3 sin 3x dx    evaluate integration of x sin 3x dx    find integration of x sin 3x dx    integration of x square sin 3x dx    integration of x cube sin 3x dx    integration of x sin 2x cos 3x dx