TI-83 & TI-84 Graphing Calculators

Press second (2ND) and then memory (MEM, above +). Then select the seventh option, Reset.... In order to delete everything, use the arrow keys to select ALL on the top and then press enter to select All Memory....

actually I'm not sure that you can do it on a calculator or not. I think the only way is deviding untill the half of the number. But I recently have found a great site that works as calculator and it can help you to understand a number is prime or not. Go to prime-calculator dot com.

You cant factor on the ti-84. however the ti-89 does do this but its almost easier to just do it in your head. Plus on the ti-89 the way you enter it in there is a very high risk for error.

//A can be any variable and -> represents the sto(store) key function getkey->A //105 is the number of the corresponding key in this case the enter key
if A=105
then
*commands*
end

If it has rechargable batteries, open the back, take out the batteries and put them in a charger. When recharged, put back in the calculator.

If it doesn't have rechargable batteries, just buy more batteries.

Once a program has been deleted on a TI-84, it is no longer in the calculator's memory. You would have to get the program from where you got it, or, if you programmed it, remake the program.

In order to type an exponent, use the carrot sign. (It looks like ^ and is under CLEAR.) For example 58 would be 5^8.

You can use the cables that come with the calculator to get them from friends that already have them.

The easiest way to input a fraction while calculating is to simply divide the top of the fraction by the bottom. So four fifths would be (4/5). To convert an answer into a fraction, such as .125, press the math button and select >Frac. .125>frac = (1/8)

This answer assumes that the x-values are in list 1. If there are in another list, substitute that list's name for L1.

Type the formula for the y-value in on the home screen, but type L1 instead of x. For example, if the formula is y = 3x + 2, type 3*L1+ 2. The y-values will show up. Use the left and right arrow keys to scroll through them. If you want to compare the lists side by side, type Ans -> (the arrow is the STO> button) L2. Then press STAT and select Edit...

Use the up and down arrow keys to scroll up and down, and use the left and right arrow keys to scroll left and right. If you want to scroll up and down faster, press 2ND ALPHA and then use the up and down arrow keys.

It is an improvement upon previous models of calculators, and the Silver Edition is just a fancy way of saying it is better. The TI 84 plus Silver Edition is a graphing calculator with a relatively large memory capacity and relatively fast processor.

The TI-83 does not have the cot button, however, if you type 1/tan( then this will work the same as the cot since cot=1/tan.

The other way to do this is to type (cos(x))/(sin(x)) where x is the angle you're looking for. This works because cot=cos/sin

First, it could be flat out broken, in which case you will need a new one. Check if this is the case by first making sure there are new batteries in the calculator. Second, make sure your screen is not just really bright. To do this, push the on button and then repeatedly push the 2nd and then up arrow to make the screen darker. If this doesn't work after a short time, its not the problem. You could finally try to turn on your calculator by resetting it. This involves taking out the batteries for a few minutes. If that doesn't work, your calculator appears busted and you probably need a new one.

Press MODE. The second line will say FLOAT and then have the numbers 1-9. If FLOAT is selected, the calculator will not round. If a number is selected, the calculator will round to that number of decimal places. For example, if you wanted to round everything to 3 decimal places, you would select "3".

You can also use the round command. To get to it, press MATH, select NUM and the top and choose the second option, "round(". Type the number and then the decimal place you want to round to, separated by a comma. For example, if you wanted to round 2.569 to 2 decimal places, you would type

round(2.569,2)

Does not exist. The only way to get the percentage character is to use an assembly program that lets you access "hidden" characters.

If you just need to convert a number to a percentage, just divide the number by 100.

(This will work for all equations that start with Y=)

Press Y=. You will see a list on the side that looks like

\Y1=

\Y2=

and so on. If you want to graph y = 2x +3 for example, type 2x+3 after \Y1=. It should look like \Y1 = 2x+3. Press graph. If you cannot see the line, press ZOOM and choose option 6, ZStandard. If you graph a line that you still cannot see after you press ZStandard, try pressing ZOOM and choosing option 0, (the last one), ZoomFit.

If you get a DIM MISMATCH error or an INVALID DIM error, press Quit. Then press 2nd STAT PLOT (above Y=) and choose option 4, PlotsOff. Press ENTER until you see "Done". Then try again. If you get a SYNTAX error, then you made a mistake typing in your equation. Choose Goto and fix the error and then try again.

The zero function is used to find x-intercepts.

Graph an equation with an x-intercept. (In this example, x2-5).

Press 2ND CALC (above TRACE), and select option 2, "zero". The calculator will ask "Left Bound?". Move the flashing x-like shape to the left of the x-intercept that you want to find with the arrow keys and press ENTER. Then the calculator will ask "Right Bound?". Move the x-like shape to the right of the x-intercept and press ENTER. The calculator will then ask "Guess?". Move the flashing shape to a point close to the x-intercept and press ENTER. The calculator will give you the coordinates of the x-intercept.

This most likely means that a stat plot is on, and that a list that the stat plot was using is blank. (If you get a DIM MISMATCH error, it probably means that the lists that the stat plot was using don't have the same number of values.)

If you are trying to graph the stat plot, go back and look at your data in the lists.

If you are not trying to graph a stat plot, then press 2ND STAT PLOT (above Y=) and select Plots Off. Press ENTER until you see "Done". Then try to graph again.

Press 2ND MATRIX (above x-1). Select EDIT at the top with the arrow keys. The select matrix [B] and press ENTER. You can now edit the matrix. (Use the numbers at the upper right to set the size.)

The sign change key on the TI-83 Plus calculator is located on the bottom row of keys to the left of the ENTER key.

It is a white key with black printing that looks like this: (-)

You must use this key instead of the blue subtraction key when you need to indicate a negative number; otherwise, the calculator will tell you it doesn't understand what you mean ("syntax error").

For example, to find the cube root of 5x5x5=125. In order to have the calculator show the cube root of 125, you need to enter the numbers in the following format. 125^(1/3) If you enter that in your TI-84 Plus exactly as its written above, it should come up with 5 as the answer. Notice the (1/3) at the end. This is the "cube." If you want to find the root of a number to, say, the 5th power you would use the following format in the example problem below. Example problem: 4x4x4x4x4=1024 Format for calculator: 1024^(1/5) Basically you put the number in front, followed by the carrot symbol ( ^ ) with the fraction (1/5), the 5 being the power of the number (the amount of times you multiplied 4 to get 1024). You have to put it in parenthesis and you have to put it as a fraction with the power as the denominator.

I don't know this model, but most calculators have one or more special function keys, which may be labelled Shift, Function, Inv, etc.; you have to press this key before you press the cosine key.

This is correct, you have to press the "2ND" button (top left) and then "COS". You will notice that "COS-1" is written above the "COS" button- this is the function you want.