求不定积分∫sin(x/2)dx
问题描述：
求不定积分∫sin(x/2)dx
答
∫sin(x/2)dx ＝2*∫sin(x/2)dx/2=-4cos(x/2)+c
答
∫sin(x/2)dx ＝＝＝2∫sin(x/2)d(x/2)
==2{-cos(x/2)}+c==-2cos(x/2)+c
答
∫sin(x/2)dx
=2∫sin(x/2)d(x/2)
=-2cos(x/2)+C