Calculators

On the Casio fx-115ES calculator, the infinity symbol (∞) is located above the division symbol (/) on the same key. To access the infinity symbol, you would press the "Shift" key followed by the division key. This key combination will allow you to input or calculate values involving infinity on the calculator.

There may be some silicon, Si, in the semi-conductors.

1972 link here for evidence http://datamath.org/BASIC/DATAMATH/ti-2500-1.htm

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To find anti log of a number enter the number as the exponent of 10.

You press the button that has the Clock/Calendar picture on it. On the first push, the date will show. On the second push, the time will show.

If you want to print just the date, then push the Clock/Calendar button once (showing the date) - and press the button that has the #/Diamond picture on it (to the right of the + button) and it will print.

If you want the date and time, then do as stated above for the date, then push the Clock/Calendar button again to get to the time and press the button that has the #/Diamond picture on it.

TaDa -

Input is when you type with the calculator

not a number

Silicon based semiconductors are the most commonly used semiconductor material in calculators. Silicon semiconductors are also extensively used in computers.

They are the same thing, Casio calls it FX-115ES in some countries, such as the U.S., and FX-991ES in most other countries. I believe this has to do with model name recognition. "FX-115" has been used in various U.S. models for a long time.

On a scientific calculator, you could press 1, and then press antilog (base 10) twice. The key might be labelled something like 10x.

If you don't know what the answer is to a hard maths question people use calculators. Like 644 times 1076? Who would know that!?

Ti Notefolio, which you are able to find on their website under software for the calculator you have. Follow the Notefolio instructions on how to use it.

In every mode except Programmer, one can see the history of calculations. The applet was redesigned to accommodate multitouch. Standard mode behaves as a simple checkbook calculator; entering the sequence 6 * 4 + 12 / 4 - 4 * 5 gives the answer 25. In Scientific mode order of operations is followed while doing calculations (muiltiplication and division are done before addition and subtraction), which means 6 * 4 + 12 / 4 - 4 * 5 = 7.

it is water resistant so yes you can surf with it buddy!

The easiest way is to buy from a High street shop or from Casio on Amazon. There are so many fakes on eBay and in other places online. If you buy from a shop only accept one in a box.

If you have already bought one push down all the buttons at the same time. The display should show 88:88, Also hold down the 24HR button for a few seconds and the words Casio should show on the screen.

yes probably something of value considering it is 38 years old and still works.

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button on a scientific calculator

You can't. It's a sign that your calculator is operating in degrees mode, as opposed to radians or gradients. Degrees is the default setting as well.

Step 1 - Press Mode

Step 2 - Press 3

Step 3 - Press Mode

Step 4 - Press 3

Step 5 - Press 9

Step 6 - Press M+

Step 7 - Repeat step 6 until the calculator displays "Data Full"

Step 8 - Press M+

Step 9 - Press 2

Step 10 - Press the "up" arrow

Step 11 - Press 3

Step 12 - Press 0

Step 13 - Repeat step 11 followed by step 12

Step 14 - Repeat step 13 until the calculator stops accepting new digits(the 3's and 0's that you just keyed in)

Step 15 - Press =

Step 16 - Press =

Step 17 - Press 0

Step 18 - Press 1

Step 20 - If you see the massage "Stack ERROR", press the "left" arrow, keep pressing if until you see "30303030303" on the display keep in mind that the blinking black box should be just beside the "3030's". If you see the massage "Math ERROR", do the same as you would if you got the massage "Stack ERROR". If you see the massage "Syntax ERROR", press left and you should see "30303030303" on the display.

Step 21 - Press SHIFT

Step 22 - Press DEL (delete)

Step 23 - Repeat step 22 until the display goes blank

Step 24 - Press SHIFT

Step 25 - Press DEL

Step 26 - Press DEL

Step 27 - Press SHIFT followed by pressing nCr

Step 28 - Press .

Step 29 - Press nCr

Step 30 - Press.

Step 31 - Repeat step 27 to step 30 until the screen "skips" and you'll see some thing like "P.C.P.C.P.C mp/mp" on the display

Step 32 - Press the "left" arrow until you reach the point of which you started keying in the "P.C.'s"

Step 33 - Press DEL six times

Step 34 - Press SHIFT

Step 35 - Press DEL

Step 36 - Press 8

yes

Not sure about the Casio, but most calculators which have capability to handle complex numbers should be similar. Input the complex number according to however you normally do that, then raise to a power. In the case of roots, you want to raise to a reciprocal power: Square root is 0.5 power, cube root is 1/3 power, fourth root is 0.25 power, etc

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