関連ワード:  integral of 1 by sin x cos cube x    integration of 1 by sin x cos cube x dx    integration of 1 by sin x into cos cube x    integral of 1 upon sin x cos cube x    integration of 1 sin x cos 3 x    integration of 1 by sin x root 3 cos x    integration of 1 sin x 3 cos x dx    integration of 1 2 sin x 3 cos x 2    integration of 1 2 sin x 3 cos x 2 dx    evaluate integration of 1 sin x 3 cos x dx