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    Re: Spur of the moment long by chron
    From: Brad Morris
    Date: 2018 Dec 16, 04:49 -0500
    Hello David

    Base 10 Log(sin(41)) = -.8131

    10+ Base 10 log(sin(41)) = 9.8169

    10 is added to avoid negative numbers.  This makes further calculations all additions.

    Brad


    On Sun, Dec 16, 2018, 3:14 AM David C <NoReply_DavidC@fer3.com wrote:

    I think that I have bitten of more than I can chew. I decided to calculate t using Norie 1970

    The first part is to evaluate   sin(lat) * sin(dec)

    which beomes

    log(sin(lat))

    log(sin(dec))

    Sum

    Anti log

    From Norie log (sin (41)) =  9.81694   (bar 1.81694)

    Regardless of which notation is used the mantissa stays the same.

    If I enter log (sin (41)) into my fx-82AU the answer is -0.18306. Not only is the answer negative but the mantissa differs from that in Norie.

    What am I doing wrong?

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