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From: fin@norge.unet.umn.edu (Craig A. Finseth)
Newsgroups: comp.sys.handhelds
Subject: Re: Interestring Property of HP-* Calculators
Keywords: 48SX,COS
Message-ID: <2830@uc.msc.umn.edu>
Date: 24 Oct 90 18:25:27 GMT
References: <2821@uc.msc.umn.edu> <15610@mentor.cc.purdue.edu>
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In article <15610@mentor.cc.purdue.edu> ags@seaman.cc.purdue.edu
(Dave Seaman) writes:
>In article <2821@uc.msc.umn.edu> fin@norge.unet.umn.edu (Craig A. Finseth)
>writes:
>>This article describes an interesting *artifact*[1] of the mechanism
>>use for computing COS and ACOS.  It has been tested on an HP-48SX and
>>TI-PROCALC (don't ask).  It is *NOT* a bug report!
>
>It is not a property of HP calculators or of the "mechanism" used for
>computing COS and ACOS.  It is merely a property of floating point
>arithmetic in general.
	...

I think that you missed the point.  I know perfectly well about how
fixed point arithmetic works and about fixed points of functions.
That was the preface.  The obvservation was that COS(x) had a fixed
point but ACOS(x) did not.

>Dave Seaman
>ags@seaman.cc.purdue.edu

Craig A. Finseth			fin@unet.umn.edu [CAF13]
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