TI-89 Titanium Help: Decimal Conversion & Tutorials

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    Ti-89 Titanium
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Discussion Overview

The discussion revolves around the use of the TI-89 Titanium calculator, focusing on various functionalities such as decimal conversion, polynomial division, and troubleshooting specific calculations. Participants share tips, seek help with specific problems, and recommend resources for further learning.

Discussion Character

  • Technical explanation
  • Homework-related
  • Debate/contested

Main Points Raised

  • One participant inquires about converting fractions to decimals and seeks tutorials for the TI-89, noting their familiarity with a previous model.
  • Another participant suggests pressing and for decimal representation and changing the "Exact/Approx" mode to adjust output.
  • Some participants discuss the implications of being in "auto" mode versus "approx" mode for decimal output, with examples provided.
  • A participant asks about factoring polynomials and receives advice on undefining variables that may interfere with calculations.
  • There are multiple inquiries about dividing polynomials, with one participant sharing a method involving variable assignment and a specific function.
  • Several participants express confusion over syntax errors and provide step-by-step instructions for polynomial division.
  • One participant seeks help with converting decimals to fractions, with suggestions including using the "exact()" function and other methods involving division by powers of ten.
  • Another participant mentions issues with compounding interest calculations returning whole numbers and suggests changing the mode to Float 12.
  • There are discussions about graphing functions and the proper syntax to avoid errors related to undefined variables.

Areas of Agreement / Disagreement

Participants generally share tips and methods for using the TI-89, but there are varying opinions on the best approaches to specific problems, such as polynomial division and mode settings. Some issues remain unresolved, particularly regarding syntax errors and output formats.

Contextual Notes

Participants express uncertainty about the correct syntax for various functions and the implications of different modes on the calculator's output. Some methods suggested may depend on specific settings or prior definitions that are not universally applicable.

Who May Find This Useful

This discussion may be useful for students and users of the TI-89 Titanium calculator seeking assistance with its functionalities, particularly in calculus, engineering, and polynomial operations.

  • #31
Mark44 said:
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.
 
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  • #32
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 don't know if i have the settings wrong or something
PLEASE HELP
 
  • #33
awesome123333 said:
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 don't 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.
 
  • #34
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!
 
  • #35
swimgirl said:
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!
What you need to do, is push the mode button, press f2 to go to the second page, scroll down to "Exact/Approx". You need to change this to Exact, or Auto. This should solve your problem.
 

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