Pythagoras
If you can remember even a little bit of trigonometry from high school mathematics, the name Pythagoras will ring a bell. His theorem is still used in the field today, although his own existence has come under scrutiny from historians over the years. Not a single piece of Pythagoras’ writing has survived into the 21st century. Many argue that the theory cannot have come from his pen, because it was uncommon for celestial spheres to be worked with during that time.
Pythagoras
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