Texas Instruments TI-89 Advanced Graphing Calculator
by Texas Instruments
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Digital Cameras Photo Reviews of Texas Instruments TI-89 Advanced Graphing Calculator
Customer Review: Great Calculator, But Watch Out
Summary: 4 Stars
This calculator has done wonders for me. It will perform almost any task that you will ever encounter in calculus, including lengthy integration and derivation. However, all of the work is left out, raising the red flag to professors that you didn't actually work through the problem. I bought this calculator over a year ago and it is possibly the most user-friendly calculator i have ever owned. I also own a HP 48G, which you will more than likely need if you are in any engineering discipline. All of my upper-level classes use the HP religiously, plus it can perform many things better than any TI can. Think of it this way: in comparison with computers, the TI-89 has the user friendly format of Windows, whereas the HP has the functionality of DOS. As with any calculator, make sure you don't use it as a crutch for any math class. My Cal II and III professors have not allowed calculators on tests, but the TI-89 will prove to be an invaluable resource in working review problems step by step. It will help you recall all the basic calculus and algebra that you might have grown rusty on.Customer Review: Makes the TI-83 look like its from the stone age
Summary: 5 Stars
I used to own the TI 83 Plus. When my class hit trig and pre-calc however i upgraded to the 89. This calculator does much more than the 83. First off the solve function is great. The other day we ended up at an equation of 0=x^2+17.32x+6. While the rest of the class was doing the problem a different way I was done using the solve which gave me the two values of x. Second, the factor feature easily factors down quadratic equations. The calculator automatically simplifies anything you input into it too. For instance, if you put log(5)it will give you ln(5)/ln(10). If you input variables with negative exponents it will change them to positive exponents as well. For trig, this calculator is great also. If you ask for the sign of pi/8 you will get the root of 2 minus the root of two over two, instead of .3826. The 3D graphs are also neat and the tons of memory allow students to put the periodic table and other features on the calculator. So what is the downside of this calculator? You have to do the work on your own sometimes! Seriously, this calculator is a great investment for any high school student.Customer Review: It has it all!
Summary: 5 Stars
The user-friendly supercalculator!A previous reviewer complained that it was hard to figure out,within a few days I am using it like a long-time user of the best calculator around.With calculus and algebra functions that'll blow you away,a neat program editing system,and all the constants and conversions you can or will ever need this is a true legend in the calculating field.The only tricky function is how to run the programs,but a quick glance at the superb user's manual and your set.And the Pretty Print is great,you can see the way the problem and answer will look on paper.The 3D graphing on it is excellent for seeing surfaces as defined by an equation.The catalog has things that aren't in any of the menus and everything that is.I had a hard time switching from the TI-82 to the TI-86 but the transition was as smooth as they come.With the Flash system I'll never need to buy another calculator,only the 20 dollar Graph Link.The processor is great(I think it's a Motorola 68000,I could be wrong).Forget this review-get this calculator.you won't be sorry!Customer Review: An asset even after college.
Summary: 5 Stars
I purchased my TI-89 two years ago, and the durability, along with upgradability will make me a repeat customer for life! I started almost 10 years ago with the TI-81, which was I believe the first graphing calculator available for regular consumer use. What power in that time! I have dropped my calculator, stepped on it, and no stratches or errors. It truly behaves brand new. Not to mention the ability to do differential equations, slope fields, and download virtually any program you could want. The battle between HPers and TI faithfuls go on, but my loyalty will always be TI. The fact you don't need some module to use programs, the display, and the option that if you truly want an HP interface, [web site] will allow you to download an application for that for free! With the exception of a few programs, that are well worth the cost, you could download any program for free, and expand this already boundryless calculator. Even after college, this calc proves to be useful for engineers that aren't near a computer. I recommend this over HP to anyone!Customer Review: Do whatever it takes to get one!
Summary: 5 Stars
I have a Ti-89 holstered on my pants at this very moment. This caculator has raised my math grade by three letters. Before I had a Ti-89 I used to have to "study" and do "homework". I would still get C's and D's on the tests though. A bet a few of you know what I'm talking about. If you just had the answer you could figure out how to do the problem! With my trusty 89 I simply type in a equation "solve(2x^3+3x^2-x+10=0,x)" and it gives you the answer! (x=-5/2). My Ti-89 gives me an extra 2 hours (at least!) each night because now I don't have to work 20 homework problems. Also when a test rolls around you will score the highest and take the least time to turn it in. Even when your not in math or science this caculator rules. You can put the most awesome games onto the 89. Ever see "Pong" for the Ti-83? The Ti-89 has "Super Mario World". Just make sure you don't tell your teacher its a Ti-89 (Trust me :) or brag to your friends (much). This caculator is the Excalibur of Math and concealed gaming.