Date: prev next · Thread: first prev next last
2019 Archives by date, by thread · List index

At 22:41 08/06/2019 -0400, Carl "Peter" Winerich wrote:
I'm trying to calculate the Equation of Time (EoT) to determine the difference between LAN (Local Apparent Noon) and GMT/UT-1 Greenwich Mean Time. Then I want to plot the EoT curve (a project for later, not now) The following is the formula I use on my calculator. The formula gives a "close enough" EoT
9.87xsin(2x360(3-81)÷365)-7.67 x sin(360(3-81)÷365+78.7)
=-4.584625249 (or.... -4 minutes 35.1 or minus)
Calc doesn't give the same answer.

It does if you translate the formula correctly.

Here's the formula in calc;
The answer it returns is: -2.14883666659093
Can you tell me what the correct layout of the format in calc is?

You have failed to close one set of parentheses - at the end of the first SIN() expression (perhaps you forgot to close the first RADIANS() expression, in fact) - but then added a spare closing parenthesis at the end of your expression. The effect is that the first SIN() expression includes all of the second part of your formula.


I trust this helps.

Brian Barker

To unsubscribe e-mail to:
Posting guidelines + more:
List archive:
Privacy Policy:


Privacy Policy | Impressum (Legal Info) | Copyright information: Unless otherwise specified, all text and images on this website are licensed under the Creative Commons Attribution-Share Alike 3.0 License. This does not include the source code of LibreOffice, which is licensed under the Mozilla Public License (MPLv2). "LibreOffice" and "The Document Foundation" are registered trademarks of their corresponding registered owners or are in actual use as trademarks in one or more countries. Their respective logos and icons are also subject to international copyright laws. Use thereof is explained in our trademark policy.