复数的几何意义 复数的幅值和相位(Magnitude and Phase) Imaginary The length is called the magnitude: a+bil =Va2 +b2 -1 p(z)】 The angle from the real-number axis is called the phase: Real 1 o(a+bi)=tan-1 5复数的几何意义 5 复数的幅值和相位（Magnitude and Phase）