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Calculators
A calculator is a hand-held inexpensive electronic device used to perform the operations of arithmetic. The simplest calculators can only do addition, subtraction, multiplication, and division, while scientific calculators can handle exponential operations, and trigonometric and logarithmic functions.
1,648 Questions
Is there a TI-nSpire online calculator?
Nspire_emu is currently the only TI-nSpire calculator available online. A simple google search will lead you in a direction where you can download and install this tool.
What does the the letter C stand for on a calculator?
"C" = clear - pressing it sets all the calculations in the calculator back to zero.
What improvements have been made to calculator?
One of the improvements that has been made to the calculator since the invention of the device is that calculators are much smaller now. Another improvement is that many of them are solar powered.
Will the graphing calculator do the same as a scientific calculator?
Usually a graphing calculator should have all the capabilities you expect from a scientific calculator (and more, since it does the graphing). For more details, check the manual of your calculator if you already have one.
How do you put negative exponets into a calculator?
The details vary, depending on the calculator. To specify, for example, 5 to the power -2, you might typically press the following keys:
5 (xy) 2 (+/-)
To specifically 10 to a positive or negative power, use the antilog function; for example, for 10 to the power -6:
6 (+/-) (10x)
What does cosine mean on a calculator?
The same thing that cosine means in trigonometry, a calculator just allows you to calculate such functions quickly.
Why do some calculators give different answers?
The difference in the working memory and significant digits, as well as the ability to handle mathematical operations in their proper order, can all cause one calculator to give a different answer than another.
There are two main types of calculator: scientific and non-scientific.
The non-scientific calculators are often simple calculators with few operations beyond arithmetic and memory operations (although they may have square roots). They are generally intended as a desktop calculator for use by people who have to add up lots of numbers. As such, they are very simple, and every operation (+-×÷) works on the last number displayed. This last displayed number could be the result of the last calculation. Thus, if you enter 1 + 2 × 3, when the multiply key is pressed, the calculation of 1 + 2 is done and the result of that is multiplied by the next number entered, that is, the result of 1 + 2 × 3 is 9 (since 1 + 2 = 3, and 3 × 3 = 9). These calculators do not have keys for parentheses, nor can they do exponential display. They are limited to something like ±0.0000001 to ±99,999,999, up to eight digits of display. Tthe more digits before the decimal point, the less that can be after it.
In contrast, scientific calculators have many more functions (e,g. trigonometric, powers, logs) and know about proper mathematical order of operations. Thus with one of these types of calculators entering 1 + 2 × 3 will give the result of 7, since the multiply is done first and then the result of that is added to the 1 - it has calculated 1 + (2 × 3). They DO have keys for parentheses, as the proper order of doing operations may need to be overridden, eg (1 + 2) × 3 to get the same result as a simple, non-scientific calculator. Scientific calculators can also handle exponential numbers, so they can handle a much larger range of numbers (something like ±1 × 10^-99 to 9.9999999 × 10^99).
There is a slight variation in the range that different scientific calculators can handle. This range depends on how much internal storage is allocated to store each floating point number. Most scientific calculators these days will display nine digits with a further two for the exponent, though some may only allow seven or eight digits, and some may allow ten or 11 digits, or possibly three digits for the exponent. Internally, they will usually work to one or two digits more than the displayed digits so that the result displayed is rounded properly.
In summary, the difference in the working memory and significant digits, as well as the ability to handle mathematical operations in their proper order, can all cause one calculator to give a different answer than another.
Why is it difficult to do arithmetic with the character form of a decimal numeral?
The difficulty arises from the fact that you have been trained, over the years, to work with decimal numbers and so, if required to add 7 and 8 you go for 5 and carry 1. In hexadecimal, where you would use characters, 7 + 8 is F and no carry.
It is not difficult once you get used to it.
What is the repeating sign on a calculator?
If you mean for a repeating decimal, then most (old) calculators used to not have it and just round the answer. However, more modern calculators with "natural math display" use the correct mathematical method of putting a dot over a single repeating digit (eg 1/6 = 0.1666... would be displayed as 0.16 with a dot over the 6), or a dot over the first and a dot over the last repeating digits if there are more then one (eg 1/7 = 0.142857... and would be displayed with a dot over the 1 and another over the 7).
If you mean for repeating an operation (eg 5 + 2 + 2 + 2...) then this repetition is either displayed by a letter k or the operation sign being constantly displayed on the screen. To achieve this some calculators require the operation to be pressed twice whereas others do it automatically. Modern "natural math display" calculators do not have this function; instead they tend to have a last entry recall feature (to allow for editing) and so the same result would be achieved by re-entering the operation (eg + 2 which would display as ANS + 2) and then using the equals and recall buttons in turn to repeat the operation.
How does a scientific calculator compute the value of sin 41.5 degrees?
Trigonometric functions are calculated using a polynomial approximation. The exact polynomial used may be different on different calculators.
Where can I buy a ti 84 calculator?
The TI 84 calculator is a Texas Instruments graphing calculator. These are widely available at stores such as Walmart, Office Depot and Best Buy. They are also available online from Amazon or eBay.
Why do you need a graphing calculator?
Graphing calculators are true to their name: they can graph out equaitions. Letting the calculator graph out equations is a lot easier than plotting and drawing your own graph, but you do not NEED a graphing calculator. Besides that, their functions are similar to other scientific caculators.
How many batteries does the Texas Instruments TI-84 Plus Silver Edition Graphing Calculator?
The TI 84 Plus graphing calculator takes 4 AAA batteries as well as a back up button cell battery to ensure that just because the batteries die does not mean the learning or storing has to.
The t1-84+ has the addition of a usb cable and preloaded apps.
Variable Annuity Calculator
Contributing to a Variable Annuity creates long term tax-deferred growth. Use this calculator to see how a Variable Annuity might fit into your retirement plan.
Future Contracts Calculator
Use this calculator to determine the number of futures contracts you may wish to purchase based on your account equity and trading plan. All investment plans should be reviewed by a financial professional before you execute them. Purchasing futures contracts is a risky investment and should only be done by experienced investors with professional advice. This calculator is only designed to help illustrate the percentage of your equity investment that is at risk with a specific future contract purchase.
Lump Sum Future Value Calculator?
Lump Sum Future Value Calculator
Use this calculator to determine the future value of a lump sum.
Find square footage of odd shape?
The answer depends on the nature of the complex shape. Some complex shapes can be decomposed into smaller shapes whose areas can be determined using standard formulae. It is then simply a question of adding the parts together. For more complicated shapes, there are essentially two options: you can either use uniform laminae and mass or estimate the area using grids.
Uniform Lamina: Copy the shape onto a sheet (lamina) of material with uniform density. Cut the shape out carefully and measure its mass (or weight). Do the same for a unit square of the lamina. Then, because the lamina is of uniform density, the ratio of the two areas is the same as the ratio of the two masses. That is: Area of Shape/Area of Unit Square = Mass of Shape/Mass of Unit Square. Rearranging, and noting that the area of the Unit Square is, by definition, = 1 sq unit Area of Shape = Mass of Shape/Mass of Unit Square.
Grid Method: Copy the shape onto a grid, where each grid square has an area of G square units. Count the number of squares that are fully or mostly inside the shape. Call this number W (for whole). Count the number of squares that are approximately half inside the shape and call this number H (for half). Ignore any square that are less than half in the shape. Then a reasonable estimate of the area of the shape is G*[W + H/2] square units. There is some arbitrariness about "mostly inside"Â and "approximately half"Â but there is no way around that. You will get more accurate results with finer grids, but they will also require much more effort in terms of counting the grid squares.
How do you calculate an antilog on a casio fx-115ES?
Below the <X-1> key, below the <MODE/SETUP> key, you will find log. You have to press the <SHIFT> key (upper left-most key) and then <log> key (which accesses the <10x> antilog function); then enter the number on which you want to perfom antilog; then press the <Ans> key
Where was the first calculator invented?
The first calculator dates back to 2700 BC with the invention of the Abacus, invented in Mesopotamia.
In the 1940's and 1950's, the first mainframe computers were invented, which led towards the hand-held calculators we know today.
In the mid-1960's, desktop calculators were coming to fruition, and in 1970, the first "Pocket" calculator was invented in Japan by Sanyo, called the ICC 0081.
What does the capital letter E mean at the end of a number on a calculator?
It means Error. If you try to divide a number by 0 it should give you the E. Also if you try to multiply numbers that will give a larger number than the calculator allows. I believe exponential calculators fix this by giving you a exponential answer.
