Product Comparison: Texas Instruments TI-89 Titanium vs Texas Instruments TI-Nspire CX CAS

General Specifications
Texas Instruments
Texas Instruments
TI-89 Titanium
TI-Nspire CX CAS
About the Product
This versatile graphing calculator features advanced functionality and 3-D graphing that makes problem-solving for AP*, advanced mathematics and engineering courses easier. Built-in Computer Algebra System (CAS) allows you to explore and manipulate mathematical expressions in symbolic form. Where to Buy
The TI-Nspire™ CX CAS provides algebraic capability to symbolically solve equations, factor and expand variable expressions, complete the square, find antiderivatives, computer limits and exact solutions in irrational forms, making it a robust hands-learning tool that satisfies math and science curriculum needs from middle school through college.
Size & Weight
7.5 in.
7.5 in.
3.3 in.
3.42 in.
0.9 in.
0.62 in.
10.2 oz.
7.04 oz.
What customers say about "Size & Weight"
Texas Instruments TI-89 Titanium Graphing Calculator
  • It has a great size and weight Being a klutz, I worried about dropping and breaking it.
  • Its lightweight and came in a nicely compact box.
  • Easy to use and is a good size.
  • This is absolutely what i needed. The right size and easy to use.
  • Sturdy, compact and easy to carry in bag.
Texas Instruments TI-Nspire CX CAS Graphing Calculator
  • Build wise, it's slickers than the bulky 83 & 84 +, but it feels a bit hollow compared to the Ti-nspire CX, that model has the best build, thing and good amount of weight, soft buttons, CAS is bit more hollow, more clicky, that's not necessarily a bad thing.
  • The calculator is thin for its class, and very light weight, the rechargeable Lithium battery definitely helps
  • Very light weight but not to the point that it feels fragile.
  • On the other hand, the TI-N is about the same size as the TI-89, maybe a cm wider and taller. It is thinner and it weights a bit less.
  • Another thing I noticed is that the device isn't weighted very well - it is top-heavy which makes it feel as if it will slip out of your hand.
Display Type
Display Size
2x3 in (100 x 160)
3.5 in (320 x 240 pixels)
Touch Screen
Display Resolution
125 dpi
What customers say about "Display"
Texas Instruments TI-89 Titanium Graphing Calculator
  • The display has a Pretty Print option (default), which is very helpful when inputting long formulas.
  • The calculator is complex enough to do double integrals and graph them, but it has a simple display screen and is very easy to operate.
  • Lightweight. Rugged. Looks good. Bright display.
  • The one area which disappoints me is the quality of the display. Both graphing and calculation are hard to read and the resolution is poor.
  • The display is barely readable. Very disappointed in this product.
Texas Instruments TI-Nspire CX CAS Graphing Calculator
  • The display makes typing long equations easy. The trackpad works well, and even has an option to tap to click instead of having to push the button.
  • The color display and shading make vector calculus much easier to understand and explain.
  • The color display is great if you vision is not what is used to be.
  • The calculator also has a beautiful color display that can be used for a number of graphing situations, including 3-dimensional plots.
  • Display failed before the 1 year warranty was up. TI says it's physically damaged (dropped, excessive pressure, got wet, etc) and therefore is not covered.
Internal Memory
2.7 MB
100 MB
188 KB
64000 KB
PC Connectivity
Battery Type
4 x AAA Batteries
Rechargeable Battery
Pre-Loaded Applications
CellSheet™, EE*Pro®, Finance, NoteFolio™, Organizer, Polynomial Root Finder, Simultaneous Equation Solver, StudyCards™, Symbolic Math Guide
Calculator, Graphing, Geometry, Lasts and spreadsheets, Data and statistics, Notes, Vernier DataQuest™ Application
Real and complex numeric results, Over 100 symbolic units in 28 categories for use in equations, computations and unit conversions, Internal Clock with date and time display, I/O port for communication with other TI products, Active Calculator Home history screen can hold up to 99 previous entries for deep recall., TI Connectivity Cable and TI Connect™ software, Numeric evaluation of functions in tables and data variable format, Icon desktop that allows easier access to apps and editors
Computer Algebra System (CAS) capabilities, TI-Nspire™ CX CAS Student Software, Recharge, Don’t Replace For Years, A Complete Learning Resource, Enter Values In Proper Notation, Make Real-World Connections, Dynamic Linking, Multiple Representations
What customers say about "Features"
Texas Instruments TI-89 Titanium Graphing Calculator
  • It has all the standard and CAS (Computer Algebra SYstem) features that we have come to expect on such a machine, plus many nice very detailed and topic as well as course specific APPS that are already preloaded or can be added in electronically and quite simply from the TI website.
  • It has a very nice calendar and note storage system for keeping track of coursework and daily workload assignments.
  • The icon system for choosing where you want to be on the machine can also be converted to a much easier and quicker to navigate text-list system.
  • It has a large amount of onboard main memory, plus additional Flash memory for tackling quite memory intensive problems.
  • In itself it handles lot many things that a normal sci. calc. is not capable of.
  • The algebraic operating system is the only choice available on this machine which usually requires many more keystrokes to do a complicated problem.
  • The available programming languages are quite limited on this machine as compared again to the HP50g.
  • Some functions that you would readily expect to be available with a single key press require instead at least two key presses, but usually with only a single shift key press first.
Texas Instruments TI-Nspire CX CAS Graphing Calculator
  • This calculator is great! In my life, I will never learn the features of this calculator to its full extent. If you need something done, this calculator can do it. I personally like the built in battery.
  • I also have a TI-84 Plus CE, and the Nspire CX CAS has so many more features that I could never be without it again. That said, it's not so robust that I'm ready to give up my TI-84 Plus CE yet.
  • The included software has all the features of the actual calculator.
  • The buttons click easier, it's faster, and has a ton more features. It also comes with a code for the student software.
  • My only complaint is that it is rather difficult to learn how to use all of it's features (not that the product is difficult to use once you know how however).
  • Battery life is actually better than I expected coming from a TI-84 running on AAA batteries that lasted a few months at a time.
Warranty / Certifications
Manufacturer Warranty
1 year(s)
1 year(s)
Other Information

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