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    Visual Bygrave, using cosine and tangent
    From: Brad Morris
    Date: 2009 Jun 15, 07:49 -0700

    This version of the Visual Bygrave uses Cosine and Tangent curves.  
    Interestingly, the solution angle is derived from the CoTangent.
    
    Version 3 used Secant and Cotangent Curves, but the solution angle is derived from the Tangent.
    
    Please note that I have been extra careful to use Bowditch style definitions 
    of the trigonometric functions, which is 10+log(abs(trig function)).
    
    This may lend some clarity to the discussion of what curves are represented on the Bygrave.
    
    Best Regards
    Brad
    
    
    File:
    Visual-Bygrave_v4.xls
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