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: from a watcher
    From: Dan Allen
    Date: 2002 Oct 17, 18:57 -0700

    On Thursday, October 17, 2002, at 06:52 PM, Dan Allen wrote:
    >
    >   cos(c) = cos(a)*cos(b) + sin(a)*cos(b)cos(ab)
    >
    > I did it by memory! ;-)
    
    Arrgggghhh!  I did it by memory and of course I typed it in wrong!!
    How embarrasing.
    
       cos(c) = cos(a)*cos(b) + sin(a)*sin(b)*cos(ab)
    
    is more like it.
    
    That's why I like to get it programmed in a calculator, tested,
    and then I can rely upon it rather than my fallible memory and hands.
    
    Dan
    
    
    

       
    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