mlsmith@NADC.ARPA@sri-unix.UUCP (06/13/84)
Due to the symmetry of the octants, only 45 degrees need to be put on the table (both sine and cosine). One trick is to make the table non-linear to get more accuracy out of the same size table. BUT that is the main question: how much accuracy is enough? If you want 10 place accuracy a series expansion may be best. If you have a powerful computer iteration is easier to code. One application I had the major requirement was speed of "computation" and I ended up using a 360 entry table to limit that time to a memory access. But unless you have special requirements, why not use the sin and cos in a typical BASIC compiler? mlsmith@NADC.ARPA
PRJohnson@MIT-XX.ARPA (06/14/84)
From: "Paul R. Johnson" <PRJohnson@MIT-XX.ARPA> The book you want to look in for sine and many other funcions is: "Computer Approximations", by John F. Hart, et. al. John Wiley and Sons, 1968 It's got it all. ---Paul Johnson -------
ee171bbr@NOSC.ARPA (06/24/84)
From: VINDICATOR <sdcsvax!sdccsu3!ee171bbr@NOSC.ARPA> This is Nick Flor, is this the same Paul Johnson who is my project supervisor at Hewlett Packard?