関連ワード:  integral of sin x 4 dx    integration of 1 sin x 4 dx    integral of sin power 4 x dx    integral of x 3 sin x 4 dx    integrate sin 4 x dx from 0 to pi 2    integrate sin 4 x dx from 0 to pi    integrate sin 4 x dx from pi 2 to pi 2    integral of sin 2x cos 4 x dx    integral of sin^4x cos^4 x dx    integral of sin 4 x cos x dx