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    Re: Which calculator to use for "arctan(tan(269))"?
    From: Frank Reed
    Date: 2016 Nov 3, 15:55 -0700

    The quadrant ambiguity of the arctangent is a normal mathematical property of that operation. Many computer languages have math libraries that implement a separate function often called atan2 which is reasonably well described here: https://en.wikipedia.org/wiki/Atan2.

    If you're doing calculator computations for lines of position, then you should consider dropping the intercept method entirely. 

    Frank Reed
    ReedNavigation.com
    Conanicut Island USA

       
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