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?

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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?

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?
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?

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°)