When i type in something simple like 63/2 it gives me the answer 63/2.. i dont know how to fix it. or whats wrong with it.

Re: 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.

Posted on Oct 07, 2007

Re: My TI-89 cant do simple calculations.

You have to press the diamond button and then enter. Or you can just put a decimal point after one of the numbers and press enter.

Posted on Sep 19, 2007

Nothing's wrong, your calculator is giving you the cosine of 42 radians. If you want the cosine of 42 degrees (which is 0.74314), press MODE, down-arrow to the "Angle" line, press right-arrow, select "2:DEGREE", and press ENTER twice.

Dec 13, 2012 | Texas Instruments TI-89 Calculator

Enter the first term as (-20^2), not as -20^2. Without the parentheses the calculator interprets it as

-(20^2), which is not what you want.

Also, make sure you use the (-) key just to the right of the decimal point and not the - key.

-(20^2), which is not what you want.

Also, make sure you use the (-) key just to the right of the decimal point and not the - key.

Aug 31, 2011 | Texas Instruments TI-89 Calculator

Make sure you're in the proper angular mode. You can see the angular mode by pressing the MODE key.

Jan 14, 2011 | Texas Instruments TI-89 Calculator

Glad to be of help.

Feb 17, 2010 | Texas Instruments TI-89 Calculator

If you still having problems email me at

raklein62@yahoo.com

raklein62@yahoo.com

Jul 10, 2009 | Texas Instruments TI-89 Calculator

Instead of just hitting enter try pushing the diamond key and enter, for the approximation function? Just a thought.

Jun 09, 2009 | Texas Instruments TI-89 Calculator

Jun 06, 2009 | Texas Instruments TI-89 Calculator

type: F2,1,12=2x+4,x)

You should see: solve(12=2x+4,x) x=4

you need to make sure that there is an '=' and then you need to type ',x' at the end.

You should see: solve(12=2x+4,x) x=4

you need to make sure that there is an '=' and then you need to type ',x' at the end.

Dec 13, 2008 | Texas Instruments TI-89 Calculator

The answer that you have received in actuality is correct. However, it is in exact form when the answer that you were looking for was an approximation (decimal form) answer. To achieve this all you have to do is hit the alpha button (the yellow button with a diamond in the center) and then enter which will give you your desired answer :-)

Jan 14, 2008 | Texas Instruments TI-89 Calculator

what i would do is go to the home screen and hit f6 and hit 'clear a-z' then you're good.

Oct 04, 2007 | Texas Instruments TI-89 Calculator

350 people viewed this question

Usually answered in minutes!

×