Texas Instruments Recent Questions, Troubleshooting Help & Support

Remove the small memory battery, and then remove one of the four AAA batteries, then while holding down the APPS button reinstall the AAA battery and then it should say waiting to recieve operating system then hook it up to your computer with the silver connect cable and then on the computer send the operating system to the TI89 Titanium, and wait for it to install completely and it should work.

here are the steps in changing it from radian to degrees
1. turn on your TI-83 plus
2. press the MODE button near the top of your calculator
3.go down to options and move the highlight from radian to degree, press enter and clear
you're good to go

Press [2nd][+] to open (Mem)ory management tool.Select [2:Mem Mgmt,Del]Press [2:Real]Scroll down to reach X;Press the DEL(ete) key.The X-variable will disappear from the list. and the stored value will be replaced by 0.You could also just use 0 [STO>][X,T,Theta,n] to reset value to 0

remove the batteries, then re-install

Ex. for 5^3, press 5, then "yx" (beneath "OFF" button), then the power (3), then press =... 5 --> yx --> 3 --> = --> 125. Hope this helps!

You've got two different issues here. Square root of 39 IS the exact answer, as the result will be a surd (an irrational number with too many - or potentially infinite decimal places). If you have been asked to round or show your answer to a number of decimal places then you use the answer toggle (the opposing arrows button above enter) to receive an approximation - a rounded answer (6.24 to two d.p. if you were to multiply these together you will see it is close to 39, but not EXACT, because it has been rounded already). You can also press the answer toggle again to see a longer decimal, but again this is rounded and not exact

Cosecant(x)=1/sin(x)

Here are some possible reasons for the error ERR:STAT

I had the same issue.

1. Open up the calculator.
2. Remove the battery.
3. Remove the two screws holding the display section down.
4. Carefully pry the button circuit board up and remove it.
5. Use an electrical cleaner and lint free cloth to wipe off the button circuit board.
6. Re-assemble and test.

For me, cleaning off the button circuit board restored all buttons to working order. When it is disassembled, and after cleaning, you could flip the board, display, etc. up and out of the case and test to see if it works as well.

Press left and right arrow and 2nd keys simultaneosly, hold it and then press ON. Release all keys at the same time and you will reset TI 89 Titanium.Or, type diamond key simultaneosly with + or -(plus or minus) key to resolve dark screen.

Hello,
Turn the satistical plots OFF
Press [2nd][Y=] (STATPLOT). Select or enter 4: to execute the command [PlotsOff] [ENTER]

Clear the lists (statistical lists)
Press [2nd][0] (Catalog]. Press [PGRM] C. The cursor jumps to the first command in catalog that starts with C (The greek letters in names do not matter). Scroll down a bit to reach the command [ClrAllLists]. Select it and press [ENTER].

Try your graphs again.
If you still have problems, just reset the RAM:
Press [2nd][+] (MEM). Press 7 to select [Reset] then [1:All Ram][2:Reset]. Press [Clear] to erase the Ram Cleard message.

Now you should be able to draw the graphs.

Hope it helps.
Thanks for using FixYa.

I get the same answer. Is b wrong? When I do it in Excel I get b= -2E+06, which is -1 797 322.99 rounded to the millions, in scientific notation. Let me know if you have any questions. Good luck, Paul

It ts easy to find solution for this problem. Type int(sin(377x-1.231),x,0.299,3.94)See captured image below

There's a cube root function in the MATH menu. Press the MATH key and it should be item 4.

Try the Ti site. I doubt it is still available as it is a very old machine.

When you reset the Memory you clear all in the RAM. Recreate your tables. If you do not want to lose something you created, archive it.

Hard Reset means reset. Everything gone and no way to recover it.

Hello,
First stop the application that is running [2nd][Quit] or [Escape]
From Home screen
[Apps][Data/Matrix Editor/][3:new] name the data set when asked.
A table is displayed Enter the values in list c1 and c2 You can rename the variables in header.
When finished press [F5:calc]
In calculation type right arrow select 5:linReg in front of x enter c1, in front of y enter c2 and [enter] to save. the equation shows when you press [ENTER]

Hope it helps.

This was asked two years ago, but if anyone finds this page maybe this will help: Instead of 1E99, try using 10^99. They have the same value but it would appear that some calculators have trouble with 1E99. It fixed it for me.