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    Re: Which calculator to use for "arctan(tan(269))"?
    From: David C
    Date: 2017 Jul 16, 13:19 -0700

    4) me too, what is the proper name of the longitudinal difference between the two locations? I think it is not t (the hour angle), which can have either sign. I'd be glad to make the instruction most clear and understandable even for a novice.

    Not trying to be smart but doesn't   dlong =  long1 ~  long2?

       
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