関連ワード:  integral of sin x 2 from 0 to pi    integration of sin 2 x dx from 0 to pi    integration of sin 2 x limit 0 to pi    integration of sin x x from 0 to pi 2 4    integrate sin 2 x dx from 0 to pi 4    integral of sin n x from 0 to pi 2    integral of ln sin x from 0 to pi 2    integral of sin 6 x from 0 to pi 2    integration of log sin x from 0 to pi 2    integration of sin x cos x from 0 to pi 2