関連ワード:  how to integrate sin^2x    how to integrate sin^2x cos^2x    how to integrate sin^2xcosx    how to integrate sin 2x    how to integrate sin 2x 2    how to integrate sin 2x cos 4x    how to integrate sin 2x 1    how to integrate sin 2x cos 3x    how to integrate sin 2x 3    how to integrate sin 2x dx