One of the coolest math videos I've seen in quite a while. Explains xkcd.com/217/ and why there are 12 musical notes, and lots of other great stuff in addition to a superb old-school-Youtube aesthetic
I’m surprised he didn’t mention that eπi = -1
Too formal, would have had to been e^pi i = -0.99985 + 0.01745 i to make it in