Theory Convert to x+iyx+iyx+iy using: z=r(cosθ+isinθ)=rcosθ+i rsinθz=r(\cos\theta+i\sin\theta)=r\cos\theta+i\,r\sin\thetaz=r(cosθ+isinθ)=rcosθ+irsinθ Multiply/divide in polar form: z1z2=r1r2(cos(θ1+θ2)+isin(θ1+θ2))z_1z_2=r_1r_2\left(\cos(\theta_1+\theta_2)+i\sin(\theta_1+\theta_2)\right)z1z2=r1r2(cos(θ1+θ2)+isin(θ1+θ2)) z1z2=r1r2(cos(θ1−θ2)+isin(θ1−θ2))\frac{z_1}{z_2}=\frac{r_1}{r_2}\left(\cos(\theta_1-\theta_2)+i\sin(\theta_1-\theta_2)\right)z2z1=r2r1(cos(θ1−θ2)+isin(θ1−θ2)) Add/subtract after converting to rectangular form.