1/(R*exp(jφ))
= 1/R * 1/exp(jφ)
=1/R * exp(-jφ)1/exp(jφ)=1/(cosφ+jsinφ)=exp(-jφ)是吗OK1/(cosφ+jsinφ)=(cosφ-jsinφ)/(cos^φ+sin^φ)=cos(-φ)+jsin(-φ)