直线x-3y-6=0和直线x+2y-3=0的夹角为
问题描述:
直线x-3y-6=0和直线x+2y-3=0的夹角为
答
arctan(1/3)-arctan(-1/2)
=arctan(1/3)+arctan(1/2)
=18.43+26.56
=45 °