関連ワード:  integration of sin2x cos4x dx    integration of sin 2x 9 cos 4x dx    int sin 2x cos 4x dx    integration of sin2x sin 4x cos 4x dx    integration of cos 4x cos 5x sin 2x dx    integral 8 cos 4x sin 2x dx    what is the integral of sin2x    integration of cos4x dx    what does sin2x integrate to    integration of sin2x tan2x dx