你好！用凑微分法∫xcos(x^2)dx=∫cos(x^2)d(x^2)=sin(x^2)+c。经济数学团队帮你解答，请及时采纳。谢谢！
∫xcos(x²)dx＝(1/2)∫cos(x²)d(x²)＝(1/2)sin(x²)＋C
