The Polar Form of COMPLEX NUMBERS // Finding the nth roots of -1

In Episode 3 of my series on Complex Numbers, we talk about the polar form or exponential form of complex numbers. Using Euler's Formula we can write any complex number as z=re^(i theta). The distance r, sometimes written |z|, is the distance from the origin while the argument of the complex number is theta. One big advantage of writing complex numbers this way is that it makes multiplying them very easy to understand as a combination of stretching and rotating.

Episode 1: Algebraic View of complex numbers
Episode 2: Geometric View of complex numbers

0:00 Polar Form
4:26 Multiplication of Complex Numbers
6:22 Ex: root 3 +i in Polar Form
8:05 Ex: cube roots of -1

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