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