delorie.com/archives/browse.cgi | search |
From: | "Marp" <Marp AT 0 DOT 0 DOT 0 DOT 0> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: Inverse trigonometry functions in Djgpp |
Date: | Wed, 29 Dec 1999 22:45:44 -0500 |
Organization: | MindSpring Enterprises |
Lines: | 30 |
Message-ID: | <84ekhk$qr2$1@nntp5.atl.mindspring.net> |
References: | <wKza4.591$eq DOT 7079 AT uutiset DOT nic DOT fi> |
NNTP-Posting-Host: | c7.b7.cf.47 |
X-Server-Date: | 30 Dec 1999 03:45:56 GMT |
X-Priority: | 3 |
X-MSMail-Priority: | Normal |
X-Newsreader: | Microsoft Outlook Express 5.00.2314.1300 |
X-Mimeole: | Produced By Microsoft MimeOLE V5.00.2314.1300 |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
The trig functions require measurements in radians, not degrees. I think the way to convert the measurements is: radians = degrees * (PI / 180) degrees = radians * (180 / PI) Jarkko Kähkönen <jarkko DOT kahkonen AT mbnet DOT fi> wrote in message news:wKza4.591$eq DOT 7079 AT uutiset DOT nic DOT fi... > Atan () - don't work! > Here is a bit of my code: > > float direction; > > direction = atan ( 120 / 90 ); > printf ("%f", direction"); > > And output is this: > 0.927295 > > But with calculator it is: > tan^-1 (120 / 90) = 53.1301023... > > Is atan () right inverse tan function? > > Greetings, > Jarkko DOT Kahkonen AT mbnet DOT REMOVETHAT DOT fi > >
webmaster | delorie software privacy |
Copyright © 2019 by DJ Delorie | Updated Jul 2019 |