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From: Ada novice <ycalleecharan@gmx.com>
Newsgroups: comp.lang.ada
Subject: Re: Arctan: to use with single or with double arguments?
Date: Sun, 26 Sep 2010 01:21:20 -0700 (PDT)
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On Sep 26, 6:02=A0am, jpwoodruff <jpwoodr...@gmail.com> wrote:

> So my suggestion is to use two-parameter arctan, and interpret the
> quadrant of the result, and thus the sign of the sine, in the physical
> sense. =A0If there is no mistake, your differential operator works even
> outside the particular domain where you are solving your problem.
>
> Best wishes
> John

Thanks. Yes it makes sense that I stick to the two-parameter arctan.
I'm working with a rotating system
and quadrant information is important. It's amazing to see
how different software treats the order of the two-parameter arctan
differently. If I'm right
C is like Ada but in MathCad, the order of the arguments is reversed.