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    Re: Calculators, cosines, and floating point computation
    From: Tony Oz
    Date: 2019 Jun 3, 02:43 -0700

    Dear Frank, thanks for the article.

    When mentioning the "forensics" results I actually meant this table.

    Because the CN topic is relatively new to me - I fell into the very "lore-drivenness" of internet in relation to the Haversines vs Cosines. However I have my own experience with this "lore-drivenness" - when I was fine-tuning my carburetor I stumbled across lots and lots of copy-pasted rubbish originating from one very old FIDONET post. Indeed this is a problem.

    Now to Cosines: this very same problem became apparent to me when I attempted to create an eye-pleasing NatHav table and its' "floating point" spin-off. To keep the resolution near 180° end I had to invent the "floating nines".

    Regards,
    Tony

    60°N 30°E

       
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