関連ワード:  integrate x 1 sinx cosx from 0 to pi 2    integral 0 to pi xsinx / 1 + cos ^ 2 x    integrate x * 1 /( sin x cos x dx from 0 to pi 2    evaluate integrate x sin x )/( 1 cos x dx from 0 to pi 2    integration of x sin x 1 cos x limit 0 to pi 2    integrate sin x * cos x )/( 1 sin 4 x dx from 0 to pi 2  
結果 : integrate x 1 sinx cosx from 0 to pi 2