Texas Instruments TI-89 Titanium Graphing Calculator by Texas Instruments
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Digital camera reviews of Texas Instruments TI-89 Titanium Graphing Calculator
Digital camera Review: Best graphing calculator on the market
Summary: 5 Stars
This is the culmination of the Texas Instruments's upper price range TI-92+, Voyage 200, TI-89 line. Although the N-Spire CAS is more powerful (>150 times the clock speed), more flexible, and more expensive, it has so far been rejected by TI's customers for its poor design and lack of programmability, which has been the TI calculators' greatest claim to superiority since TI's first graphing calculator was introduced in 1990. Until the N-Spire series matures, consider the TI-89 graphing calculator the most powerful calculator that Texas Instruments sells.
This calculator is not suitable for middle-school or high-school levels. The TI-84+ is much cheaper than the TI-89 and has everything those students will need. Although younger students certainly could appreciate the additional power of the TI-89, you're wasting your money if they're not going to take college level math or engineering classes.
The most remarkable difference beteween the TI-89 and the less expensive TI-83/83 Plus/84 Plus line is its ability to operate symbolically. Almost any function or operation can be run in terms of a general variable just as well as it can on an actual number, which is extremely useful in matrix manipulation. This is in contrast to the TI-84 Plus's ability to just substitute numerical values for variables. Also, on the TI-89 you can create your own functions in the BASIC editor, which allows you to use BASIC to compute values for graphing or anything else. And of course the 89 has the many more preprogrammed functions and little useful features that you would expect from a more expensive product.
It's definitely possible to get through college with an 84+, using it for computation while you do symbolic manipulation in your head, but the 89 will make your life easier and you'll appreciate its power; I miss all sorts of functions when I have to use an 83/84 and don't regret getting my 89.
Digital camera Review: CHEAPER AT RADIO SHACK
Summary: 5 Stars
Ordering this item from Radio shack will save you about 10 bucks, yeah I know thats not much but college is expensive!!!`Digital camera Review: Calculus Useage - High School
Summary: 4 Stars
Overall, this is a pretty good calculator. However, it should be noted that it does take some time getting used to, especially when switching from a TI-83. The graphs are exceptional and there are many new options. Actually the amount of things it can do is both exhilerating and frustrating at the same time. One negative point is that when you enter in a simple calculation, like 734/87, it will NOT give you the decimal answer and will just leave it in fraction form. I hate that. Therefore, simple calculations are no longer simple on here.Digital camera Review: Calculus and beyond.
Summary: 4 Stars
I'm a master of the TI-83 calculator, and can do just about anything on it. I'm taking calculus courses in college, however, and the TI-83 doesn't support much mathematics past algebra.
First off, this thing kicks ass if you just need to know something without all the steps in between. It's very easy to factor, differentiate, anti-differentiate, solve equations, etc.
My only major con is the learning curve involved with this calculator may be a little steep. Being in a college course, I have to show my steps in solving problems. This calculator won't do that for me, but it allows me to double check my answers.
Digital camera Review: Can't go wrong with the TI 89 Titanium
Summary: 4 Stars
This calculator has a powerful computer algebra system (CAS) and plenty of storage space for extra programs and data. If you're looking for an advanced graphing calculator to do some quick and dirty graphing or some relatively advanced math, you should consider this model as a contender. The construction is relatively solid although all the newer calculators don't feel as sturdy as the older models do (ie. TI-85, HP-48g, etc..). The TI connect software supports windows and mac but not linux so think about this before you buy. The USB port makes transferring programs from the computer easy and the display has high resolution (100x160). The keys are shaped weirdly but they're not too shabby. The manual is horrible so you should find a tutorial to help with the learning curve. Also consider the TI-86 and the HP-50g as they are both excellent calculators and are probably easier to learn to use.