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Technical Description

The Texas Instruments TI-89 is a 2-D and 3-D graphing utility, a computer algebra system, and powerful calculator.  The -89’s included calculus and variable algebra solving abilities make it very useful for doing calculus and calculus based sciences, i.e. chemistry, physics and biology.  In the document I will explain how to use the

  • Solving function
  • Integration capability
TI-89 Titanium

TI-89 Titanium

TI-89TI-89

Technical Specifications:

The TI-89 runs on a 32-bit microprocessor, the Motorola 68000, which nominally runs at 10, 12, or 16 MHz, depending on the calculator’s hardware version. Texas Instruments has allocated 256 kB of the total RAM for the unit (190 kB of which are available to the user) and 2 MB of flash memory (700 kB of which is available to the user). The RAM and Flash ROM are used to store expressions, variables, programs, tables, text files, and lists.


Solving:

To get to the “Solver” function first press “F2”, then press “1” you should now see a “solve(“ appear in the bottom left had corner of your screen. Now type in the equation you want to solve, immediately after your equation hit the comma key, and then the variable you want to solve for, and close the parenthesis. It should look something like this “solve(x^2-4=0,x) and it will tell you that x=2 and x=-2

You don’t even need to have the equation solved for 0. If you pull of the Solver application back up (by pressing ‘F2’ and then the ‘1’ key) and type in x^2+2x=-2x-4 so that it looks like this “solve(x^2+2x=-2x-4,x) it will tell you that x=2

Integration:

To use the integration capability of the calculator first press the ‘F3’ key and scroll down until you see “integrate” or just hit ‘2’ then type in the expression you want to integrate, the variable you are integration for, and your upper and lower limits, all separated by a comma.  so if you wanted to integrate “x+6″ from 0 to 15 you would type it in so that it looks like this ” (integration symbol)(x+6,x,0,15)  x+6 being the integrand, x is the variable we are integrating over, 0 is the lower limit, and 15 is the upper limit. And the -89 tells you that it equals 202.5