Law Of Cosines II (visual proof)

This is a short, animated visual proof of the Law of Cosines using the Pythagorean theorem. This theorem relates the side of a triangle with the other two sides and the angle between those two sides.

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This animation is based on a proof from Timothy Sipka in the October 1988 issue of Mathematics Magazine (https://www.jstor.org/stable/2689363 ) page 259.

For another visual proof of this same fact check out:
https://youtu.be/vNCe7ciFwVc

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To learn more about animating with manim, check out:
https://manim.community
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Music in this video:
Elegy by Asher Fulero