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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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