HP Forums
hp9830a - Printable Version

+- HP Forums (https://archived.hpcalc.org/museumforum)
+-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html)
+--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html)
+--- Thread: hp9830a (/thread-10208.html)



hp9830a - Andy Delano - 07-20-2001

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 - Jim L - 07-20-2001

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 - John Ioannidis - 07-20-2001

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