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    Calculator forensics
    From: Tony Oz
    Date: 2019 May 29, 06:04 -0700

    Hello!

    Finally I managed to grab a CASIO fx-98. Very happy now! :) Perfectly fits into a wallet, now all I need carry along is a long-term Sun/stars table and a cheat-list with few formulas. (and a watch!)

    However, these are limitations:

    CASIO fx-98:

    • atan(acos(asin(sin(cos(tan(9°))))))=8,9999564°
    • acos(atan(asin(sin(tan(cos(9°))))))=9°
    • asin(acos(atan(tan(cos(sin(9°))))))=9,0000157°
    • acos(asin(atan(tan(sin(cos(9°))))))=9°
    • asin(atan(acos(cos(tan(sin(9°))))))=8,4421811°
    • atan(asin(acos(cos(sin(tan(9°))))))=8,7535133°

    Yes, it is sort of artificial and unrealistic calculation but one must be alert.

    Warm regards,
    Tony

    60°N 30°E

       
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