From:	horst DOT kraemer AT snafu DOT de (Horst Kraemer)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Problem with asin()
Date:	Thu, 16 Sep 1999 02:54:16 GMT
Organization:	[Posted via] Interactive Networx
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References:	<37DFD832 DOT DFD9BAB1 AT helawann DOT de>
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On Wed, 15 Sep 1999 19:32:34 +0200, Hela Wann <hela AT helawann DOT de>
wrote:

> I have to calculate an angle with asin()
> 
> why do i not receive the correct value of 44,7°???
> in borland the return value is limited to -pi/e - +pi/2, why????

Not only in Borland C. This is the mathematical definition of ArcSin.

What else should it return ?


> The code line is:
> 
> dx = asin(alpha/s);

asin/acos/atan/atan2 do not return degrees but radians - and sin/cos
expect radians as input and not degrees.

Regards
Horst

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