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Path: utzoo!linus!decvax!tektronix!orca!andrew
From: andrew@orca.UUCP (Andrew Klossner)
Newsgroups: net.lang.c
Subject: Re: C language hacking
Message-ID: <1161@orca.UUCP>
Date: Wed, 14-Nov-84 15:32:51 EST
Article-I.D.: orca.1161
Posted: Wed Nov 14 15:32:51 1984
Date-Received: Fri, 16-Nov-84 01:40:42 EST
References: <5715@brl-tgr.ARPA>
Organization: Tektronix, Wilsonville OR
Lines: 16


	"It would also be nice if sin( x ) and cos( x ) could be
	computed simultaneously with reduced cost.  I doubt if this is
	possible but would like to know if it is."

Sure:

	sine = sin(x);
	cosine = sqrt(1.0 - sine*sine);

Sqrt() is lots cheaper than cos().

:-)

  -- Andrew Klossner   (decvax!tektronix!orca!andrew)       [UUCP]
                       (orca!andrew.tektronix@csnet-relay)  [ARPA]