Question about Texas Instruments TI-89 Calculator

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Home screen on my home screen when i try to enter even simple multiplication it doesn't give any answer or do anything and there used to be two bars where i enter but now there is only one and every time i press enter the thing that says like 30/30 starts from around 14/30 and keeps going up every time but gives no answer and the screen seems to be messed up too

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Download flib from the internet and send it to ur gc.
type flib("slrcl") in your home screen
press F1 8
Try again if it works

Posted on Jul 09, 2008

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How to calculate standard deviation

Hi there,

My name is adieh. Hav a great day.

Here are the tips on how to calculate standard deviation using a graphic calculator:

1. Turn on your graphing calculator, go to the stats/editor screen and enter your data set into list1. Once this is done, return to your home page by hitting the home button.

2. Push the catalog button and scroll through the applications until you find "stdDev(". Place the arrow next to it and press enter.

3.Type the word "list1" into the open parenthesis. After you have put that in, close the parenthesis so you calculator doesn't show an error message.

4. Press the enter button. The calculator has done the calculations and you now have the standard deviation of your data set.

Using 1-var stats in the stats/editor screen will also give you the standard deviation. Using that function will also give you other information associated with your data set.

Hope it helps.

Thank you for using fixya.

Sep 23, 2011 | Texas Instruments TI-84 Plus Silver...

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How do I get my ti-nspire to give me answers in degrees? I have everything set to degrees, yet it spits out the wrong answer.

The following screen captures pertain to TI Nspire OS 2.1
Turn calculator ON. It calculator is not in HOME screen press the HOME button.k24674_32.jpg

Press digit key 5:Settings and status. Select 2:Settings, then 1:General



On sdecond line Angle open the drop down window and select Degree.
Use TAB a few times to move cursor to the OK button. and press ENTER.

Mar 10, 2011 | Texas Instruments Office Equipment &...

1 Answer

When typing in the following I go not get the right answer on nspire cas expand((3m^3n^2)(2mn)) give me 6m^3n^2 mn instead of 6m^4n^3 why?

Simple. The calculator interpreted what you entered as much as it could. However when it got to the 2mn part, it recognized the factor 2 and carried out the multiplication of 3 and 2 to give 6, but you never defined for it what mn was. To make sure it understands, insert an explicit multiplication sign between m and n, otherwise it considers the grouping as some new variable. Implicit multiplication cases are easily recognized when they involve a number and a variable, but not when two letters follow one another.

Note: I believe you are not using the right command. Yes, it gives the result here, but the command you should be using is factor( rather than expand(. expand( will open up parentheses and lengthen the expressions. Just thought you might want to know.

Feb 21, 2011 | Texas Instruments TI-Nspire Graphic...

2 Answers

When I hit the "GRAPH"

Hi emmabatting,

One of the statistical plot's may be on while your trying to graph other functions. You can go to the y= editor / STAT editor and, turn them all OFF.

1). Press [CLEAR] at the Home screen
2). Press [2nd][Y=] Open's the (STAT PLOT) editor screen.
3). Press [4:PlotsOFF]
4). The PlotsOff Command should now display at the Home screen.
5). Press [ENTER] , Now the plots should be off.

If you still have this error even after you turned off the plot you may have a list that is a invalid dimension. List dimensions can only be between 1 and 999. A matrix can only be between 1 and 99. Or your trying to invert a matrix that isn't square.

If you want to examine the list, lists or matrix that is given you trouble just [2nd] [list]. Then stroll and, select the one you want to look at by pressing, [ENTER]. You'll have to press, [ENTER] again and, the list or, matrix should display at the Home screen. The lists your looking for are probably the ones used to make plots. You can do the same looking for matrices, just use the [2nd] [MATRX], instead of [2nd] [list]. At the Home when you get to them your looking for the ones that are not square, like 2 by2 or 4 by 4 etc.

But, if you do find a invalid list or, matrix to delete press, [2nd] [MEM] [2] and then, [4] for lists or, [5] for matrices. This will display all the lists or, matrices to delete. You can go through them and, see if one or, a few of them are the ones you want to delete. To delete a list or, matrix just stroll to the list you want to delete with the little dot marker to the left of the list or, matrix and, press [Del]. If the list or, matrix is archived you will have to unarchive it first. To unarchive a list or matrix just hit the [ENTER] key and, a asterisk will disappear and, now press [Del] key to delete it.

f you can't find the list that is causing you problem you can clear all the lists. To clear all the lists first clear the Home screen by pressing [Clear] at the home screen. Next, press [2nd] [MEM][4] and the ClrAllLists command should display at the Home screen. Next, press [ENTER] and this should set all lists dimensions to 0.

To fix it so you that don't have problems like these, users should group their variables and, lists when they can. And use the SetUpEditor command when make lists. Just little things solve a lot of head aches later on.

Jan 16, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

I can't do simple commands like expand( ), integrade, differentiate,... I know that the command is expand(X^3-1) but the answer i get is always { } with no answer in it thanks for ur help Tom

Hi tomschepers1,

I can see why the expand command doesn't work with the equation your inputting. Even though, expand(x^3-1,x) would work better. The expand command does not expand to a complex form. But, your other functions should have worked. The {} tells me your asking the calculator to do something it can't do or, is to big to do, (to many arguments).

So, you need to use the NewProb command at the Home screen. On the command line at the Home screen press, [CLEAR]. Then press, [2nd][F1][2][ENTER] and, the NewProb command will be entered at the Home screen. If that doesn't enable the functions to work properly, then you need to reset your RAM to default conditions. To reset the RAM to it's defaults press, [2nd][MEM][F1][Right Arrow][2][ENTER].

If you have any question about my solution, please post your comment and, I'll respond quickly.

Jan 14, 2011 | Texas Instruments Voyage 200 Calculator

1 Answer

Does my ti-86 solve sq. root problems

Yes, your Ti 86 should solve square root problems. At the HOME screen press [CLEAR] [2nd] [x^2] which gives the (Square Root Symbol) to display at the Home screen. Then enter the number you want the square root of and close the bracket [ ) ] and, press the [ENTER] key.

You can even get the square root of complex numbers too. Select the correct complex format in the mode settings. For example: I'll do one in the rectangular form by enter a number as (a, b). I then will go to [2nd] [MODE] then [Arrow down] 3 times and make sure the RectC is highlighted and selected. Then quit out of the mode settings screen and enter [CLEAR] [2nd] [x^2] [ ( ] [9] [ , ] [ - ] [4] [ ) ] [ ) ] [ENTER], this displays the SQRT((9,-4)) equals (3, 2); The real part is 3 and the imaginary part 2.

Jan 09, 2011 | Texas Instruments TI-86 Calculator

1 Answer

Half of my home screen is taken up by the graph application. how do i get the screen back to normal? also everytime i do anything the answer is wrong ex. 5x6=3.0e1 ???

You're in a split-screen mode. To get out of it, press MODE, press down-arrow to get to the line beginning "FULL", use left-arrow to highlight the "FULL", press ENTER, then 2ND [QUIT].

It's giving you the correct answer. 5x6 is 3x10^1, which is 30 in scientific notation. To get out of scientific notation, press MODE, highlight "NORMAL" on the top line, press ENTER 2ND [QUIT].

Nov 23, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

Okay, so I have a problem where I need to get what 25/3 is...when I put this into my ti-89 titanium from the home screen the only answer it gives me is 25/3, what is up with that? It won't do simple...

If you leaf through the manual with its 500 some pages you will diuscover that your last statement is not quite right.
The "problem" is that the calculator is configured to perform EXACT calculation where fractions are kept as fractions and radicals as radicals.

To have your fractions displayed as decimal numbers ALL THE TIME
Press [MODE][F2]
Use Arrow down to highlight [Exact/Approx
Use right arrow to unfold the menu list and select [3:Approximate]
Press [ENTER] to save configuration

There are two other ways to convert an exact result into an approximate one
  1. If you enter 25./3 or 25/3. or 25/3. and press [ENTER] the fraction will be displayed as a decimal number (The dot is a decimal mark, and it instructs calculator to perform approximate calculations)
  2. If enter 25/3 without the decimal marks and press [Diamond][ENTER] the result will be decimal.

Feb 17, 2010 | Texas Instruments TI-89 Calculator

1 Answer

Simple addition

First you're going to want to navigate to the Home icon that is on the main screen by using the arrow keys, then once you press enter you will arrive at a different screen and you will be able to enter numbers and symbols at that screen. once you press the appropriate keys for your math problem you will then want to check over that problem and once it is what you want you will then want to press the enter key. The answer should come up. If you do a division problem though, it will just give you a fraction, to get a decimal answer you will then want to press the green diamond key and then the enter key in one extra keystroke to get your final useful answer.

Sep 08, 2008 | Texas Instruments TI-89 Calculator

2 Answers

My TI-89 cant do simple calculations.

You have to set how the calculator handles numbers. To do this follow these steps: 1. Press the 'MODE' button. This brings up the calculator's main settings page. 2. Scroll down until you reach a field titled 'Exact/Approx...'. This is the setting for how the calculator handles numbers, whether it will show the exact answer (which is usually in fraction format) or whether it will show an approximate number (which will be in decimal format). 3. Press the right arrow which will bring up the options for that setting. You must now choose between three ways of handling numbers: -'1:AUTO' will determine which type of answer the calculator will give based on what numbers you want it to calculate (e.g. if you want an answer in decimal format just add a decimal somewhere in your problem). -'2:EXACT' will automatically display all answers in either whole number format or in fraction format. -'3:APPROXIMATE' will automatically display all answers in decimal format. 4. After you have selected one of those options press enter one more time to get out of the 'MODE' dialogue and return to the 'HOME' screen. Now try a problem and see what happens. Personally I like using 'AUTO' because then I don't have to keep returning to 'MODE' when I want either or. Hope this helped, I had the same problem when I first started using the TI-89.

Sep 18, 2007 | Texas Instruments TI-89 Calculator

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