Question about Texas Instruments TI-89 Calculator

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Posted on Jan 02, 2017

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SOURCE: how to use ti-89

Hello,

The calculator is very sophisticated but it does not solve all problems. In particular it does not know (does not have) the Integration by parts algorithm. But you can always have a numerical value of a definite integral.

To store a number in any variable

You enter the number 18[STO->][Alpha]A stores 18 in A.

My opinion is that you cannot take advantage of the functionalities of this calculator if you do not take some time to consult the manual. You do not have to read the whole thing, just read the chapter or the exemples that show you how to handle your current question (whatever it may be.)

Hope it helps.

Posted on Sep 12, 2009

SOURCE: cube roots on ti89

The TI-89 has one function to find whatever root you want of a number.

To find the cubed root of say...64, you would type:

root(64,3)

Posted on Nov 14, 2009

SOURCE: i cannot plot graph in my Ti 89 graphing calculator

That means one (or more) of the variables you have in your function is not defined. Check to make sure you didn't misspell any variable name. Also, check to make sure you didn't run two variable names together. "ab" is the variable ab, not a times b.

Posted on Feb 18, 2010

SOURCE: A student tried to enter an inequality into her

these calculators have a small ram memory battery inside open the case remove it then put it back in "think watch battery" this happened to mine.

Posted on Jul 25, 2010

Here is a screen capture that may help you. Variable must be x. Be careful what type of brackets you use to enclose the arguments. use the ones that are on the same line as Pi, theta, i.

Sep 19, 2013 | Office Equipment & Supplies

Without performing a hard reset, you can avoid implied multiplication and insert a multiplication sign (*) between a variable and a function. For example if you enter xsin(x) you must insert the multiplication sign (*) and write x*sin(x), otherwise the calculator will assume that xsin( is a function. It will look for it and not finding it, will send an error message. Similarly, if you want to enter x times y or some othervariable, you must insert the multiplication sign, x*y

Mar 06, 2012 | Texas Instruments TI89 Graphic Calculator

Try to reset it by taking out the batteries and leaving to sit for a minute or so, if that doesn't work take out the small battery as well and leave it sit, if you're still stuck you can call ti-cares (800-842-2737) they're generally very helpful.

Aug 05, 2011 | Texas Instruments TI89 Titanium Scientific...

I''m glad you got this to work. For anyone else with this problem, in the y = page you can go to f5 and reset the settings, or you can highlight the plot 1 line and press [clear] this will not clear any other settings you may have inputted.

Mar 11, 2011 | Texas Instruments TI-89 Calculator

Having received no response in half a year, I assume my suggested reset solved the problem.

Sep 28, 2010 | Texas Instruments TI-89 Calculator

You need the TINspire CAS (Computer Algebra System) to do symbolic manipulations. The Blue TINspire (with TI 84 keyboard) can only perform numerical computations.

If you use variables, the calculator will assign the numerical value stored in the variable.

If you use variables, the calculator will assign the numerical value stored in the variable.

Aug 17, 2010 | Texas Instruments TI-Nspire Graphic...

Your x or X variable contains garbage values coming from some previous calculations.

In Home screen press [2nd][F1] to activate the (F6) function key.

Select [1: Clear a-z] or [2:NewProb]

This will clear the contents of all one-letter variables.

Press [F3: Clac] and select [1:d ( differentiate]

Enter the function right after the left parenthesis

Enter a comma

Enter the name of your independent variable, presumably x

Close the parenthesis and press [ENTER]

In the following screen capture the pipe symbol | may not be available to you on the TI89 keyboard, so you must find it at the end of the [CATALOG].

The screen capture come from a Ti92Plus not a Ti89 (the screen is larger), but the instructions given above are valid.

In Home screen press [2nd][F1] to activate the (F6) function key.

Select [1: Clear a-z] or [2:NewProb]

This will clear the contents of all one-letter variables.

Press [F3: Clac] and select [1:d ( differentiate]

Enter the function right after the left parenthesis

Enter a comma

Enter the name of your independent variable, presumably x

Close the parenthesis and press [ENTER]

In the following screen capture the pipe symbol | may not be available to you on the TI89 keyboard, so you must find it at the end of the [CATALOG].

The screen capture come from a Ti92Plus not a Ti89 (the screen is larger), but the instructions given above are valid.

Jun 16, 2010 | Texas Instruments TI-89 Calculator

In your calculations you are using a variable which stores a numerical value. In the HOME screen, on the command line use the keyboard to type in NewProb (case sensitive) and press ENTER. It will rest the variable to their default state.

If you are using a product of two functions, exeample x times sine of x, you must explicitely insert the multiplication sign otherwise the calculator will interpret the group xsin(x) as some unindentified entity.

If you have expressions such as 3*x you must not write them with the number to the right in the form x3. It will be interpreted as an undefined entity.

To avoid problems of interpretations always insert the multiplication sign.

If you are using a product of two functions, exeample x times sine of x, you must explicitely insert the multiplication sign otherwise the calculator will interpret the group xsin(x) as some unindentified entity.

If you have expressions such as 3*x you must not write them with the number to the right in the form x3. It will be interpreted as an undefined entity.

To avoid problems of interpretations always insert the multiplication sign.

Mar 02, 2010 | Texas Instruments TI-89 Calculator

Hello,

The home directory is where it does its cooking. If you want to work in some other directories go to that directory and run your application. But if you do so the application may look for a routine, a variable at the wrong place, and will not find it.

To avoid this problem, in Dos based computers you had a PATH variable, that contains all the possible paths to directories where a program might look for a necessary variable.

Hope it clarifies things.

The home directory is where it does its cooking. If you want to work in some other directories go to that directory and run your application. But if you do so the application may look for a routine, a variable at the wrong place, and will not find it.

To avoid this problem, in Dos based computers you had a PATH variable, that contains all the possible paths to directories where a program might look for a necessary variable.

Hope it clarifies things.

Aug 26, 2009 | Texas Instruments TI-89 Calculator

go to home and type Define x

Apr 13, 2008 | Texas Instruments TI-89 Calculator

May 21, 2014 | Texas Instruments TI-89 Calculator

Feb 17, 2014 | Texas Instruments TI-89 Calculator

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