関連ワード:  integral of sin 4 x cos 2 x    integral of sin 4 x cos 2 x dx    integration of sin x 4 cos 2 x 1    integration of sin x 4 cos 2 x 1 dx    integration of 3 sin x 4 cos x 2    integration of sin x 3 4 cos 2 x dx    integration of 4 5 sin x cos 2 x    integration of cos x 6 4 sin x cos 2 x    integration of 4 5 sin x cos 2 x dx    integration of 4 sin x cos x 2 cos 3x 2