复数极坐标加减运算

问题描述:

复数极坐标加减运算
600∠120°+400∠-60°怎么算?
(150,30°)+(200,120°)=?400怎么变成-400?

(600,120°)+(400,-60°)=(600,120°)+(-400,120°)=(200,120°)