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## TI-89 Titanium help

 Quote by hirtmd I bought a TI-89 Titanium about a year ago, but since then I have moved from Washington (state) to Virginia. Somewhere in between here and there is the cd that came with my TI-89. I need to hook it up to my computer for various things, and need the driver off of that cd. Is there anywhere online that would have that driver? I have thoroughly searched the TI websites and have googled my eyes out trying to find this thing. Any help is appreciated.
You need the TI Connect software.
http://education.ti.com/educationpor...i_connect.html

 I am trying to do complex numbers on my calculator. For example doing 4e^(i*30°)+3e^(i*80°) and having it output in the same format. Thanks

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 Quote by txxp4 just got a new ti-89, wondering how to change a decimal to a fraction on it, just a simple thing and cant figure it out, any help?
Use the "exact()" function

Example:
Input: exact(.625)
Output: 5/8

Alternativerly, just take the decimal number divided by 10^n where n is the number of sig. figs.

Examples:

(Decimal to convert is 0.625, 3 sig figs so 10^3 = 1000)
Input: 625/1000
Ouput: 5/8 (assuming you're in "auto" mode on the calculator)

(Decimal to convert is 0.0625, 4 sig figs so 10^4 = 10000)
Input: 625/10000
Output 1/16

 i was just wondering if anyone knew how to display residuals in the data/matrix editor
 hi how would i do sin^3(x) on my ti 89 because it doesnt work when i do ^3 or ^2
 This helped me out lots! I had the same problem, and I was about to sell mine because I could not get it to work! But now I get to keep my awesome calculator! -Cozmic
 When I do a compounding interest problem on my TI-89 Titanium, it returns the answer as a whole number with no decimals. I have tried changing "Exact/Approximate" in the Mode menu, "diamond"-enter, but it always rounds the answer to the next whole number. Any help with this? Thanks.
 Hi, when try factor(2x^2+17xy+y^2) the result is the same equation, the same result with quadratic polynomials doesn't give a facotr answer. Thanks
 I am trying to graph the function y1=8x*cos(x). But everytime I do an error message tells me that I have an undefined variable. I went to F6 and cleared all variables a-z but i still get this message. Any suggestions?

 Quote by jccumpa Hi, when try factor(2x^2+17xy+y^2) the result is the same equation, the same result with quadratic polynomials doesn't give a facotr answer. Thanks

try this

factor(2x^2+17*x*y+y^2)

xy doesn't mean x*y (it does to you and me but not to the 89)

 Quote by jpnissan35 When I do a compounding interest problem on my TI-89 Titanium, it returns the answer as a whole number with no decimals. I have tried changing "Exact/Approximate" in the Mode menu, "diamond"-enter, but it always rounds the answer to the next whole number. Any help with this? Thanks.
Change your mode to Float 12

 Quote by deadeyedick I am trying to graph the function y1=8x*cos(x). But everytime I do an error message tells me that I have an undefined variable. I went to F6 and cleared all variables a-z but i still get this message. Any suggestions?
1. Make sure you're in Function mode, (i.e. not Polar or Sequence, etc)
2. If that doesn't work, make sure everything you want to keep (like programs/functions, etc) are archived, and press 2nd+On+Left+Right at the same time, it will reset your calculator back to stock, then it should work!

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 Quote by deadeyedick I am trying to graph the function y1=8x*cos(x). But everytime I do an error message tells me that I have an undefined variable. I went to F6 and cleared all variables a-z but i still get this message. Any suggestions?
 Quote by i2c 1. Make sure you're in Function mode, (i.e. not Polar or Sequence, etc) 2. If that doesn't work, make sure everything you want to keep (like programs/functions, etc) are archived, and press 2nd+On+Left+Right at the same time, it will reset your calculator back to stock, then it should work!
My guess is that the calculator doesn't like 8x, and that the expression on the right should be 8*x*cos(x).

 Quote by Mark44 My guess is that the calculator doesn't like 8x, and that the expression on the right should be 8*x*cos(x).
8x*cos(x) graphs fine for me on my 89.

 i am having trouble factoring :( when i try to factor 4x^3+12x^2-8x i end up getting 4x(x-.561..)(x+3.561..) i dont know if i have the settings wrong or something PLEASE HELP

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 Quote by awesome123333 i am having trouble factoring :( when i try to factor 4x^3+12x^2-8x i end up getting 4x(x-.561..)(x+3.561..) i dont know if i have the settings wrong or something PLEASE HELP
get it off decimal mode. I don't have one, so I don't know exactly how, but that is what you need to do. My calculator (a casio classpad) refers to non-decimal mode as "standard" mode.

 I need help with my Ti 89. When I factor or solve from the F1 algebra menu it gives me answers in matrix format. I have tried clearing memory and reformatting...... Please help!!!!!!!!!