Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    Name or NavList Code:
    Email:
       
    Reply
    Re: Calculator forensics
    From: Brad Morris
    Date: 2019 May 29, 14:32 -0400
    Tony

    Since each atan takes as its function tan, since each acos takes as its function cos, since each asin takes as its function sin; may I suggest some elimination of terms.  This yields
    9°=9°
    9°=9°
    9°=9°
    9°=9°
    9°=9°
    Which demonstrates ideal accuracy ;)

    B

    On Wed, May 29, 2019, 1:18 PM Tony Oz <NoReply_TonyOz@fer3.com> wrote:

    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

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

    Enter the email address associated with your NavList messages. Your NavList code will be emailed to you immediately.
    Email:

    Email Settings

    NavList ID Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site