[dboreham]

This was my first use of open source, around 1978. I wondered how calculators and computers did trig functions, and was also using Unix V7. We had a large disk and kept the source on line. So I was able to find this: https://www.tuhs.org/cgi-bin/utree.pl?file=V7/usr/src/libm/s... and from there this book: https://www.biblio.com/book/computer-approximations-john-f-h...