関連ワード:  integration of sin x 2 dx    integration of sin 2 x dx from 0 to pi    integration of sin 2 x dx limit 0 to pi    integration of sin 2 x dx is equal to    int of sin 2 x dx    integration of sin inverse x 2 dx    integration of 1 sin x 2 dx    integration of 2x sin x 2 dx    integration of x sin 2x dx    integration of x 3 sin x 2 dx