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From: david@imd.UUCP
Newsgroups: net.lang.c
Subject: Re: C language hacking
Message-ID: <2@imd.UUCP>
Date: Sun, 18-Nov-84 00:17:51 EST
Article-I.D.: imd.2
Posted: Sun Nov 18 00:17:51 1984
Date-Received: Mon, 19-Nov-84 03:40:19 EST
Lines: 7
Nf-ID: #R:brl-tgr:-571500:imd:3300002:000:227
Nf-From: imd!david    Nov 16 15:59:00 1984

>        sine = sin(x);
>        cosine = sqrt(1.0 - sine*sine);
>Sqrt() is lots cheaper than cos().

But is it the positive or negative root of the sqrt?
By the time that was figured out, one probably could have called cos().