Question about Texas Instruments TI-89 Calculator

My calculator has been for awhile doing thing. An example of what happens is that when I am on the home screen typing in anything, it will be entered in as a "t" symbol and when I press 2nd its a "tan(". It happens pretty randomly and it also just freezes the calculator when its doing nothing. any help to provide?

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Try changing the batteries. Mine had the same issue and that fixed it. FYI you may also want to change out the back-up battery as well since it is now most likely drained. Hope this helps.

Posted on Oct 23, 2007

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Posted on Jan 02, 2017

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The "problem" is not how to calculate with numbers expressed in Scientific Notation but how to enter a number given to you in scientific notation. Once the number is entered you do not have to do anything special. If you have to multiply it use the (x) button. to add it use the + button, etc.

How to enter a number in scientific notation.

Type in the mantissa (example 6.022)

Press the [X10^x] at the bottom of keypad.

Enter the exponent (example 23)

with this example you will have entered Avogadro's number 6.022x10^23

Other example

1.6 [X10^x] (-) 19 enters the electron charge in Coulombs. The exponent is negative that is why you press the change sign key (-).

How to enter a number in scientific notation.

Type in the mantissa (example 6.022)

Press the [X10^x] at the bottom of keypad.

Enter the exponent (example 23)

with this example you will have entered Avogadro's number 6.022x10^23

Other example

1.6 [X10^x] (-) 19 enters the electron charge in Coulombs. The exponent is negative that is why you press the change sign key (-).

Aug 24, 2011 | Casio fx-300ES Calculator

- In Home screen, Press [2nd][F1] (F6) to open the CleanUp menu.
- Press
**[1:Clear a-z] or [2:NewProb] and press [ENTER].** - After the calculator displays Done, Press the [MODE] key.
- Navigate the pages till you find the option Exact/Approx.
- Select EXACT.
- Return to the Home screen and type in your integral, using the syntax $( f(x), x) and press ENTER. Here the dollar sign stands for the integral sign.
- If you want a definite integral, the syntax is $( f(x), x, lower_bound, upper_bound).

Jun 23, 2011 | Texas Instruments TI-89 Calculator

Decimal to fraction:
Type in your decimal (i.e. .5)
Then press [MATH] > press [ENTER] on [>FRAC]
Then press [ENTER] again
Example:
.5>Frac
1/2
For a fraction to decimal:
Simply type in the fraction and press [ENTER]
Example:
1/3
.33333333333
(*Note that the decimal value is truncated to fit the screen)

Hope that helps! Have fun calculating!

Hope that helps! Have fun calculating!

May 03, 2011 | Texas Instruments TI-84 Plus Calculator

If I understand your question correctly, this is what you can do. Go to 'Y='. Put (for example) 3x^2+4x+5 in Y1. Press '2nd', 'Quit' to go back to the home screen. Press 'Vars', arrow right to 'Y-Vars', 'Enter' on 1:Function, and 'Enter' on Y1. This should put Y1 on the home screen. After Y1 type a parenthesis, the number you want to evaluate, and another parenthesis, like this: Y1(7). Press 'Enter'. You should get 180.

Feb 06, 2011 | Texas Instruments TI-84 Plus Calculator

Sorry, but it takes sometime to be well familiar with the calculator. The E in the result is a short-hand notation for times 10 to a power. What you got is 4x10^(0) which is just 4.

Your calculator is doing that because it is configured to display result in SCIENTIFIC format.

To revert to the format you may be more accustomed to,

Your calculator is doing that because it is configured to display result in SCIENTIFIC format.

To revert to the format you may be more accustomed to,

- Press the [MODE] key
- The first line of the displayed screen will show NORMAL SCI ENG and the cursor blinking on SCI or ENG.
- Use the left arrow to highlight NORMAL and press ENTER.
- Press [2nd][MODE] to (QUIT) and go to main calculator screen.

Aug 25, 2010 | Texas Instruments TI-84 Plus Calculator

Hi,

What kind of cursor? Is it checkered? If it is the memory is full that is why you cannot type anything anymore.

What kind of cursor? Is it checkered? If it is the memory is full that is why you cannot type anything anymore.

- Delete games,
- clear all lists [2nd][MEM][4:ClrAllLists][ENTER.]
- Clear entries [2nd][MEM][3:Clear Entries][ENTER.]
- If that is not enough reset Ram [2nd][MEM][7:Reset][1:All Ram] [2:Reset][ENTER]. Clear the Ram Cleared message.

Dec 04, 2009 | Texas Instruments TI-84 Plus Calculator

Perhaps you have some data stored in the x variable.

With the calculator on, press [2nd] then the minus button. This brings up a list of all the saved data in the calculator. Look through the far left column of the list for x.

If you find x in the list, highlight x, then press F1, and then select delete.

Now it should work like normal.

With the calculator on, press [2nd] then the minus button. This brings up a list of all the saved data in the calculator. Look through the far left column of the list for x.

If you find x in the list, highlight x, then press F1, and then select delete.

Now it should work like normal.

Oct 22, 2009 | Texas Instruments TI-89 Calculator

Press 4 then press math. Select #5. You'll be back at the home screen now type 90 and press enter. You can use this for any root.

Aug 04, 2009 | Texas Instruments TI-84 Plus Silver...

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

type flib("slrcl") in your home screen

press F1 8

Try again if it works

Jun 08, 2008 | Texas Instruments TI-89 Calculator

Try hitting Enter after plugging in the numbers. That should make the numbers stay.

Oct 26, 2006 | Texas Instruments BA-II Plus Calculator

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