How Good is the Texas Instruments TI-89 Titanium Graphing Calculator?
- Powerful and versatile graphing calculator
- Solve certain tasks or problems much faster
- Important functions are easier to access – with just a push of a button
- Great battery life
- LCD is adjustable and light sensitive
- No warning or alert tone when the battery is running low
- High learning curve
A staple of classrooms and workplaces, the TI-89 Titanium’s accessibility, power, and reliability have solidified its usage worldwide. For those looking for even more power or a computer algebra system, check out the nSpire series. Otherwise, the TI-89 is more than enough for daily usage.
Ease of Use
Before the release of the nSpire series of graphing calculators, the TI-89 Titanium graphing calculator was considered to be the simplest and most powerful calculator for all mathematical applications: easily beating computer programs such as R, Origin, and Mathematica in simplicity while being able to keep its own on processing power. As such, this calculator has been recommended by high school teachers, college professors, and workplace experts. Its ability to combine usability with complex calculations makes it perfect for any task that requires intermediate to heavy mathematical analysis.
Like all Texas Instrument calculators, it comes with an intuitive, color-coded keyboard which displays numbers in black and functions in gray. The 2ND and ALPHA keys allow for easy selection of other functions while more rarely used functions are stored in various menus. For inputting formula, symbols, and expressions, the TI-89 Titanium works with the common algebraic notation, which many should be familiar with.
- 16 preloaded programs for scientific/mathematical analysis
- Three times the memory of basic TI-89
- USB link and ability to connect to the internet
- Large adjustable display
The Texas Instruments TI-89 graphing calculator is equally sturdy as its predecessors. A reinforced plastic casing secured with stainless steel screws allows for parts to last the lifespan of the calculator, with the user only having to replace batteries through an easily accessible slot in the back of the calculator. The screen is also extremely durable and does not fade or lose resolution throughout usage.
Recently, Texas instruments have added a free patch for the TI-89 that allows for:
- graphing improvements
- solving inequalities
- solving equations involving vectors
- nth root and log to any base functionality
- implicit derivatives
- gradian angle measurements
This is on top of its already hefty series of functions, which cover nearly all of the applications necessary for practical mathematics. Combined with 2.7MB of ROM and 188k of RAM, placing the TI-89 as one of the fastest calculators at its price point. Users of the TI-89 report that its speed and functionality often exceed expectations. However, this may be the reason TI-89 is banned on the ACT standardized test: its ability to solve
Users of the TI-89 report that its speed and functionality often exceed expectations. However, this may be the reason TI-89 is banned on the ACT standardized test: its ability to solve nearly all the questions in high school mathematics would simply be unfair to students using other calculators.
Texas Instruments have been producing this device for many years: therefore, it features many guides and troubleshooting tips on its official website. As this calculator is used by many others as well, their posts and guides are also viewable online as well, in various online websites listed here. There are already many FAQs, forums, and helpful tips that have been published online for free for technical questions.
As this calculator is used by many others as well, their posts and guides are also viewable online as well, in various online websites listed here. There are already many FAQs, forums, and helpful tips that have been published online for free for technical questions.
- ROM: 2.7 MB
- RAM: 188 kilo
- Screen: 160 by 100 pixels, greyscale
- Power: 4 AAA batteries, backup button battery
- Programmable: Yes
- Tests: Usable for SAT, PSAT, AP, Praxis, and IB tests. Not usable for ACT test