From: ajschrotenboer AT lycosmail DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Re: sin() and cos() ???
Date: Thu, 17 Dec 1998 16:29:52 GMT
Organization: Deja News - The Leader in Internet Discussion
Lines: 31
Message-ID: <75bbhr$sqv$1@nnrp1.dejanews.com>
References: <367833E6 DOT 84CD87A5 AT pge DOT com>
NNTP-Posting-Host: 207.74.20.23
X-Article-Creation-Date: Thu Dec 17 16:29:52 1998 GMT
X-Http-User-Agent: Mozilla/4.05 [en] (Win95; I ;Nav)
X-Http-Proxy: HTTP/1.1 student.westottawa.k12.mi.us (IBM-ICS), 1.0 x10.dejanews.com:80 (Squid/1.1.22) for client 207.74.20.23
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

The trig functions are defined w/ radians, not degrees.
To convert to degrees to radians, multiply degree measurement times 180/pi

Incidentally, 45 degrees is pi/4 radians.

In article <367833E6 DOT 84CD87A5 AT pge DOT com>,
  Mike Purtell <mtp4 AT pge DOT com> wrote:
> What am I missing ?
>
> I call ...
>
> #include <stdio.h>
> #include <math.h>
> ...
> printf("The SIN of 45 Deg is %.2f\n",sin(45) );
> and get .851 ??
> and then
> printf("The COS of 45 Deg is %.2f\n",cos(45) );
> and get .525 ????
> ...
> I would expect .707 for both !
>
> Any response would be thunderously applauded
>
> Mike Purtell
> mtp4 AT pge DOT com
>
>

-----------== Posted via Deja News, The Discussion Network ==----------
http://www.dejanews.com/       Search, Read, Discuss, or Start Your Own