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    Need formulas for arcsin and arctan
    From: Andrew Corl
    Date: 2006 Mar 27, 11:18 -0500

    I am working on a personal project to design a sundial for my house.  Yes I know this is not a sundial list.

     

    I need a formula for calculating arcsin and arctan.  I have gone on the web and searched a number of different places to look but have not found anything that really helps.  I am not looking for a long winded explination of why it works, but just this is what you do to get the answer.

     

    The one formula I have is:

     

    SH=arcsin(cos declination of wall * cos latitude)

     

    I have the declination of the wall and the latitude, but cannot calculate arcsin.

     

    I know that many of you are more into math than I ever hope to be so I decided to seek guidance from you.

     

    Thanks,

    Andrew

     

       
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