Trigonometry and Pythagorean theorem.
FYI, the spanish translation for sine is seno and its abbreviation is sen. Hence the sen in the photo.
Look, I don’t know what you people are doing for International Women’s Day, but I’m giving props to Rear Admiral Grace Hopper, who helped conceive of COBOL, popularized the term “debugging” and wrote the first computer compiler.
Here she is talking to a room about network latency and microseconds, and, if you know me, you know that’s the quickest way straight to my heart.
Grace Hopper - Nanoseconds (by SeHouMusic)