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    Re: Calculators, cosines, and floating point computation
    From: Tony Oz
    Date: 2019 Jun 4, 03:55 -0700

    Dear Brad, may be I mis-read your reply, but I feel some degree of irritation on your side.

    I'm so interested in this Cosine calculator issue because my TI-83+ was constantly throwing an exception for several days in March while doing plain arc-cosine of no-fancy Law of Cosines HC computation at LAN. Investigation has shown that the input value to the arccos() was equal to 1,0000000000001. I had to guard that function with an "If X<=1 ..." check.

    Warm regards,
    Tony

    60°N 30°E

       
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