3 ms·

I so rarely get to learn new words that I've never once encountered before, but this piece had one. "Prostapheresis" Apparently it's an archaic trigonometric m

I so rarely get to learn new words that I've never once encountered before, but this piece had one. "Prostapheresis" Apparently it's an archaic trigonometric method for approximate multiplication and division.

Someone 10y ago
https://en.m.wikipedia.org/wiki/Prosthaphaeresis https://en.m.wikipedia.org/wiki/Prosthaphaeresis
- Aelinsaar 10y ago
  That was a genuinely enjoyable read, thanks.
- goldenkey 10y ago
  As a mathematician who is still in the learning phase and intuition is lacking, thank you. This method is ingenius and makes the invention of logarithms make even more sense consequentally. HN rocks :-)