Is anybody familiar with Feynman's lecture on algebra? Vol I Chapter 22? The first time I read it many years ago, I didn't grasp the development of Euler's formula. The result was astounding. And more so due to the way he developed it. In subsequent readings, I skipped over that part because I had learned other means of deriving the same formula. This time through, I was holding on by a fingernail, but still didn't get it.(adsbygoogle = window.adsbygoogle || []).push({});

Euler's formula:

[itex]e^{\text{i$\omega $t}}= \cos \text{$\omega $t} + i \sin \text{$\omega $t}[/itex]

Is there another source that takes the approach Feynman took in his lecture? It's pretty clear that Feynman's development is "old school". It's also clear that it's worth understanding.

Whatever happened to the slide-rule?

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# Feynman's Lecture on Algebra

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