Re: How does the calculator calculate cos(x)?

Re: How does the calculator calculate cos(x)?

• To: CALC-TI@LISTS.PPP.TI.COM
• Subject: Re: How does the calculator calculate cos(x)?
• From: "John A. Limpert" <johnl@RADIX.NET>
• Date: Thu, 23 Oct 1997 03:52:02 GMT
• Organization: RadixNet Internet Services
• References: <19971018135201.JAA10220@ladder02.news.aol.com> <34491C0A.9DD3CEE4@cyberg8t.com>
• Reply-To: "John A. Limpert" <johnl@RADIX.NET>
• Xref: paladin.american.edu bit.listserv.calc-ti:18036

Two popular methods for calculating transcendental functions are CORDIC
and polynomial approximation. Hewlett-Packard used CORDIC in their early
scientific calculators, not sure about the more recent models. Most
software math libraries use polynomial approximations. The Taylor series
is too slow (poor rate of convergence) for practical use.

See http://www.ezcomm.com/~cyliax/Articles/RobNav/sidebar.html for a
description of CORDIC.

--
John A. Limpert    Delenda Est Cyberpromo
johnl@Radix.Net
Finger johnl@Radix.Net for PGP public key.

• How does the calculator calculate cos(x)?
• From: ArchDluxxx <archdluxxx@AOL.COM>
• Re: How does the calculator calculate cos(x)?
• From: Geoff Hagopian <galois@cyberg8t.com>

• Prev: People are too dependant on calculators
• Next: Re: ROM VER. HELP
• Index(es):
  • Main
  • Thread