Texas Instruments TI-89 Titanium Graphing Calculator - Black

Works great for my high school son

Works great for my son who is in high school. Apparently whatever model the teacher uses has a few keys that are in different spots so not every function works using the exact same keys, but that has not been a problem for my son. However, if your child's teacher uses a specific model I would suggest getting that model instead so that learning would be easier for someone not as technologically inclined as my son.Read full review

Powerful calculator

This is a used item of course, so the only thing guaranteed is the calc itself. I'm loving the computer algebra system on it; taking DE and Linear Algebra this semester and never knew how much of a time saver it was. Solves for x, does operations for polynomials, factors, integrates and d/dx functions, trig extpansion, etc. Only thing thats kinda a pain is matrices, but you get used to it. Wish I had this earlier. Lot of other calcs have CAS, but this is at great price too.

this website lists a lot of the features and gives you a good idea of what this calc can do and gets you started using fast as well:
prenhall d0t c0m /esm/app/graphing/ti89/homescreen/Menukeys/f1 d0t html

replace all the d0ts and c0mRead full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: Vt793et9Q3O@Del...

Perfect for the engineering student

If your studying engineering this is a must have, It has all the features that you need to succeed. with it's build in computer algebra system it can evaluate and simplify expressions, and display them as they would be written by hand thus making test easier. It returns all of the equations for a quadratic variable making it the ideal cheat-a-lator. well worth your time and effort to learn how to use this jewel.Read full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: 222775

PhD Mathematician in Plastic

Incredibly powerful \. You probably won't be able to use all of its functions.

On the negative side: font showing date and time is incredibly small and there is no way to increase font size.

Verified purchase:  Yes • Condition: new • Sold by: dealoff

Really great calculator.

The beauty of this calculator is that it can perform basic algebraic functions for you; no more binomial expansion or tedious polynomial operations. Makes checking work very easy, and is even approved for the SAT and AP examinations. And the price is right; used with barely any wear.Read full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: nhfastcash

TI-89 calculator

The TI-89 calculator meets the needs for the AP Calculus high school class requirements. It took a bit to learn the features, but it works great. The price was very competitive compared to a new one. No blemishes or damage to the calculator. It is a great deal.Read full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: sithfran

this is a great tool, i love every inch of it but,

only gave 4 star as I was expecting a backlight for the price of it in the market. Aside from the backlight, it is a very useful, great tool for deeper Math.lol. it is also something you would have to know how to use, otherwise, is useless. youtube has and the website of the product itself. goodluck Read full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: speedwasafactor

oldie but goodie

The ti-89 is very powerful. It's legal for the SAT/AP/PSAT but not the ACT or IB tests. While it lacks color, that's arguably not that important in a graphing calculator. What is nice is that the TI-89 can do symbolic operations and calculus, which the TI-84CE can't do. Given the cost differential against the standard TI-84 Plus CE, I'd much rather get a more powerful TI-89 at a fraction of the price, even though it's a "discontinued" model. Read full review

Verified purchase:  Yes • Condition: pre-owned • Sold by: youshallknow

Ti 89 titanium review

Fantastic. Bought this for AP calculus bc and my undergrad for mechanical engineering. Has tons of features and extra programs can be downloaded. Not to mention it's built like a tank

Verified purchase:  Yes • Condition: pre-owned • Sold by: iqcollectibles

So many functions!

As an Engineering student this is a must have. So many apps and capabilities. Very user friendly. Pretty print feature is bomb!

Verified purchase:  Yes • Condition: pre-owned • Sold by: ZMrhvggBQzK@Del...