电子科发女学光电科学与工程学院 SCHOOL OF OPTOELECTRONIC SCIENCE AND ENGINEERING OF UESTC 1.Complex numbers A complex number,C,is defined as C=R+i1,C'=R-il Representation of complex numbers in polar coordinates C=C(cos0+jsine) where C=VR2+12* C R I C R I = + = − j , j ◆ A complex number, C, is defined as 1. Complex numbers ◆ Representation of complex numbers in polar coordinates C C j = + ( cos sin   ) where 2 2 C R I = +