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Re: Dozier Formula
From: Dan Hogan
Date: 2001 Nov 21, 8:17 AM

Aubrey:

Thanks. I more or less thought that. I was using an HP32SII for the
reduction. I had to work out the formula from the second rewrite in the book
to get it to work.

On 20 Nov 2001, at 9:01, Aubrey O'Callaghan wrote:

> Dan,
> The reason for going rectangular to polar is so that the solution comes out in
> the correct quadrant. You can appreciate that arctan (A/B) = arctan(-A/-B).
> One solution is in the NE quadrant the other in the SW quadrant. Some
> programming languages have a function atan2 which takes 2 arguments and
> ensures that the computed angle is correct. (m.soft excel has this). The R->P
> is a workaround for calculators. Aubrey.

Cheers
-Dan-

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