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    Re: Why are NA sight reduction tables not
    From: Alexandre Eremenko
    Date: 2012 Apr 9, 18:06 -0400

    Yes,
    Imade two mistakes in copying the formula, the correct formula
    is
    sin A=(cos Dec sin LHA)/cos h.
    I apologize for this.
    
    Alex.
    
    On Mon, 9 Apr 2012, utf-8?Q?=C3=96rjan Sandstr=C3=B6m?= wrote:
    
    >
    > tried the formula " sin A=(cos Lat sin LHA)/cos h " repeatedly, got wrong 
    answers all 4 "problems" on each calculator, one borrowed Casio CFx9850G and 
    one TI-82 Stats I bought Saturday.
    >
    > To take one of the wrong answers.
    > when I plugged in
    > arcsin ((cos 64?41.4 sin 31?35')/cos 28?43.4')
    > got answer 14?47.5', correct answer was 216.2? according to USNO.
    > it seems impossible to get correct answer if I add or subtract 14?47.5' from 
    any of the four cardinal points 90?, 180?, 270? or 360?.
    >
    > If I remove Lat and replace with Dec I get 36?16.3' which if added to 180 
    gives 216?16.3' which is close enogh for my navigation.
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