Khan Academy: Pre Calculus: Basic Complex Analysis

A video [13:04] introducing complex analysis. Complex numbers are defined as a number having two parts: a real part and an imaginary part. The instructor shows how to graph these in the complex number plane. The video also explains how to convert complex numbers into polar coordinates and graph on a corresponding Argand Diagram. Then the polar coordinates are used to convert a complex number into exponential form using Euler's Formula.