関連ワード:  integral of sin 4 x from 0 to pi    integral of sin 4 x from 0 to pi 2    integration of dx 5 4 sin x from 0 to pi 2    integrate sin 4 x dx from 0 to pi 2    integration of sin 4x from 0 to pi 4    integrate sin 4 x dx from 0 to pi    integration of sin 4x cos 4x from 0 to pi    integral from 0 to pi/4 of sin^5(x)    integral of ln sin x from 0 to pi 4    integral of sin 2x cos 4x from 0 to pi 2