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    Re: Need formulas for arcsin and arctan
    From: Richard B. Langley
    Date: 2006 Mar 27, 15:33 -0400

    The 32 digits are correct. Mathematica gives the same result.
    -- Richard Langley
    On Mon, 27 Mar 2006, Paul Hirose wrote:
    >Everyone with Windows has a calculator with trig functions. You just
    >have to know where to look. In Windows XP, click the Start button,
    >Accessories, Calculator. If the standard (non-scientific) calculator
    >appears, click View, Scientific.
    >To get arc sine of .5 for example, put .5 in the calculator display,
    >click the Inv box, then click sin. The result should be 30.
    >The Windows calc has a hellacious number of digits. The square root of 2
    >gives 1.4142135623730950488016887242097. I have no idea if all these
    >digits are valid.
    >It is strange that there's no square root key. You have to click Inv
    >then the x^2 key to extract a square root. I'd give up the x^3 key in
    >exchange for a square root key.
     Richard B. Langley                            E-mail: lang@unb.ca
     Geodetic Research Laboratory                  Web: http://www.unb.ca/GGE/
     Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506 453-5142
     University of New Brunswick                   Fax:      +1 506 453-4943
     Fredericton, N.B., Canada  E3B 5A3
         Fredericton?  Where's that?  See: http://www.city.fredericton.nb.ca/

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