HP Forum Archive 06

[ Return to Index | Top of Index ]

hp9830a Message #1 Posted by Andy Delano on 20 July 2001, 10:26 a.m. I recently uncovered an hp9830a which still works. I've been playing around with it and noticed that it has the following trig functions: sin(x) cos(x) tan(x) atn(x) It doesn't have built in functions for arcsin or arccos. I was wondering why. Does anyone know? Thanks, Andy

That's standard BASIC Message #2 Posted by Jim L on 20 July 2001, 12:32 p.m., in response to message #1 by Andy Delano I'm not sure if they were trying to save space in the interpreter or, because BASIC was originally designed as a teaching language, trying to force the programmers to think about how to generate ASIN and ACOS from the other functions. Maybe both.

Re: That's standard BASIC Message #3 Posted by John Ioannidis on 20 July 2001, 2:34 p.m., in response to message #2 by Jim L RTFM! (it is available on this very site!) Page 2-18: "The arcsine and arccosine functions are not directly obtainable on the Model 30. However, they can be easily obtained by using the following formulas..." /ji, who hasn't used a 9830 in 20 years

[ Return to Index | Top of Index ]

Go back to the main exhibit hall