Ten Algebraic Trig Calculators
Created By David@TechForText.com, ©2010
To contact the author use the above email address, or
To use any of the ten Calculators enter numbers in the set of white input boxes, associated with the Calculator you are using. To enter or delete numbers you must first left click with the mouse on the relevant white input box. Each calculator functions independently, and numbers entered for one calculator do not cause calculations in the other calculators.
Before all the numbers are entered into a Calculator, you may see error messages. If the user enters numbers that do not satisfy an equation error messages will also be displayed.
Each Calculator has an error checking device, which functions by substituting the calculated result into the unsolved version of the equation. If the left and right sides of the equation result in numbers that are equal, the device displays the words No error. If this is not the case, the device displays the word: Error.
Note: The embedded page (below) with the Calculators is equivalent to a 10 page document. To see all of the Calculators you must scroll all the way down.
Links to Obtain the Free Downloads
The Software You Need
The spreadsheet versions of the Calculators require either Microsoft Excel, or the free OpenOffice.org software package, which is available at www.OpenOffice.org. In addition, Microsoft Windows is required for the spreadsheet versions.
Note: If you do not have Microsoft Excel, download the OpenOffice.org software package, because it is free and it is almost as good as the Microsoft Office suite. To download go to www.OpenOffice.org or left click on these words.
Technical Information, and How the
Ten Algebraic Trig Calculators were Created
Spreadsheet formulas were created for each Trig Calculator. To do this the equation shown on the top of each calculator were solved for an unknown. Then, the resulting equation was translated manually into a format that is recognized by spreadsheet software.
For educational purposes, the spreadsheet formulas used for each calculation device are displayed directly on the device itself, near the location of the actual formula, which is not visible. You may copy and/or modify these formulas, and use them for your own needs.
The name mechanism, in Microsoft Excel, was used to define the meaning of each symbol used in the spreadsheet formulas. This involved defining letters in the formulas, in terms of specific input boxes. This method results in spreadsheet formulas that more or less look similar to conventional formulas. The alternative method uses cell designations instead of letters. Formulas created with cell designations do not look like conventional mathematical expressions.
This website was designed to maximize efficiency and ease-of-use (usability, user-friendliness). The text is presented with relatively large fonts. The paragraphs are short, and the sentence structure and wording were written to maximize comprehension*. The website has a very simple layout, on a single page. This makes it easy to navigate intuitively, by scrolling down or up. All the links for downloads and websites are also written with large fonts, and clearly marked as links, such as with the following words: left click on these words.
Note: The ideas on this website and the Algebraic Trig Calculators are technical, and they require knowledge of trigonometry. In addition, some familiarity with spreadsheets and computer technology is also needed for maximum comprehension.
I design and build user-friendly software based calculation devices for arithmetic, accounting, currency exchange rates, algebra, trigonometry, correlations, calculus, and databases with built-in calculation devices. I also create attractive online calculation devices for websites, and web communication forms. This includes forms with built-in calculation devices. For a list of websites with calculation devices that I created, left click on these words, or go to the following website: www.TechForText.com/Math
I write instructions for the devices I build. I can also write instructions for software and computer devices created by others. In addition, I can write advertising for your websites, products and services.
I can provide the services mentioned above on a fee-for-service basis, or possibly based on temporary or permanent employment. If you are interested in my services, and want additional contact information or more data on the services I offer, you can email me at David@TechForText.com or use a website communication form, by left clicking on these words.
I am located in the USA. If you are a great distance from my locality or are in another country, this is not important. I can provide these services worldwide, because the software and websites I make can be delivered through the Internet to any locality, providing there are no governmental restrictions.
For a list of all the services I offer see www.TechForText.com
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