Texas Instruments TI-89 Graphing Calculator

Item # CEP89TCLM
| Mfg # 89TCLM
| UPC # 033317192038
Our Price: $174.99
Retail: $190.00 | You Save: 7%
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Essential for 16-18, university and beyond, the TI-89 is the most logical graphing calculator for advanced mathematics studies. Enhanced with Flash technology, this graphing calculator gives you the flexibility to add calculator software applications and additional functionality, providing long-term value. The TI-89 is allowed for use on the AP Calculus, AP Statistics, AP Physics, AP Chemistry, PSAT/NMSQT, SAT I, SAT II Math IC & IIC. 

Technical Information 


  • Real and complex numeric results
  • Symbolic manipulation for algebra, calculus and differential equations
  • Numeric evaluation of functions in tables and data variable format Interactive analysis of function values, roots, maximums, minimums, integrals, derivatives, intersections, inflection points, and arc lengths
  • Recursively-defined sequences access any number of previous terms
  • Slope and direction fields for exploring differential equations
  • List-based one- and two-variable statistical analysis, including eight regression models
  • Statistics plots including scatter, xy-line, box and modified box plots
  •  Histograms and regression lines
  • Matrix operations including inverse, determinant, transpose, augment, elementary row operations, and reduced row echelon form Matrix elements can be real or complex and numeric or symbolic
  • Column-logic expressions in data/matrix editor are retained for automatic recalculation when values change
  • Hexadecimal and binary operations and conversions
  • Differential Equations: Exact symbolic solutions of many 1st- and 2nd-order ordinary differential equations
  • Solve single or systems of differential equations using Euler or Runga Kutta methods
  • Graph slope fields or direction fields 

Linear Algebra:

  • Eigenvalues Eigenvectors Functions of matrices (like e A) LU or QR decompositions
  • 3-D Rotation and Contour Plots: Real-time rotation of 3-D surfaces and contour graphs
  • Units of Measure: Use units in equations, symbolic computations, and unit conversions
  • Select from 20 constants and over 100 units
  • Create and store your own custom units
  • Systems of Equations: Solve systems of linear and nonlinear equations
  • Display results in general or matrix formats
  • Programming
  • Custom menus
  • Dialog boxes
  • Pop-up windows
  • User-defined functions extend built-in functionality
  • Graph Parametric and polar equations
  • Recursively-defined sequences
  • 3-Dimensional surfaces
  • Differential equations 


  • Standard Memory: 500 KB RAM
  • Standard Memory: 702 KB
  • FlashBattery Information
  • Power Source: Battery


  • Package Contents: TI-89 Graphing Calculator Unit-to-Unit Link Cable Printed Mini Guidebook

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Product Warranty Information


All instruments in our catalogs and on our shopping site carry the manufacturers' warranties against defects in parts and workmanship. Should a defect occur within the manufacturer's warranty period, contact us immediately.

We will be glad to help facilitate the repair or replacement as specified by the manufacturer. The manufacturer will determine whether the defect is covered under their warranty; we do not make that determination.

Please note: U.S.-based manufacturers WILL NOT honor warranties for items sold and shipped outside the U.S. Also, if a school, school district, or board of education purchases an instrument and resells it to an individual, the manufacturer considers the warranty to be void. Warranties are extended only to the original purchaser!

All warranties, stated or implied are held with the product manufacturer and they vary from item to item. Consult the documentation that came with your product for details in addition to the information below.
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