Euler's Formula Explained Through Exponentials and Rotation
3Blue1Brown · Lecture · YouTube title: What is Euler's formula actually saying? | Ep. 4 Lockdown live math
Why it's here
HN recommends it as the explanation that makes complex exponentials click, especially for understanding the Fourier transform.
What it covers
A 3Blue1Brown live lockdown math episode asking what Euler's formula e^(pi i) is actually saying. It builds intuition through exponentials, rotation and vectors landing on the unit circle.