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by smallstepforman 457 days ago
This is the first time I encountered the quarter pi formula:

1 − 1/3 + 1/5 − 1/7 + …

Amazing …
1 comments
rottc0dd 457 days ago
There is a playlist by 3b1b for different interesting derivations of Pi: https://www.youtube.com/watch?v=8GPy_UMV-08&list=PLZHQObOWTQ...
link