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From: RCONN@simtel20.arpa (Rick Conn)
Newsgroups: net.micro
Subject: Re: Arctan approximation for generating pi
Message-ID: <1087@brl-tgr.ARPA>
Date: Sat, 28-Dec-85 00:06:55 EST
Article-I.D.: brl-tgr.1087
Posted: Sat Dec 28 00:06:55 1985
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For those who are interested, the math libraries (MLIB.SRC and MLIB2.SRC)
in the Ada repository (see pd:<ADA.MATH>) contain many routines, including
SIN, COS, EXP, LOG, etc, which are implemented using continued fractions
rather than power series.  I have run some brief tests of these routines
(using a DEC Ada compiler) against the DEC standard math library under VMS,
and the results agreed completely in over 99% of my tests, where the remaining
tests differed only by a few hundred-thousandths.  Since most of the Ada
code is simple calculation, you can probably read the code easily whether
you know Ada or not.

	Rick
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