Texas Instruments TI-89 Advanced Graphing Calculator
by Texas Instruments
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Our Price: $249.25 Availability: Usually ships in 1-2 business days Buy Used: from $49.94 (click here) Category: CE See more product details |
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Digital Cameras Photo Reviews of Texas Instruments TI-89 Advanced Graphing Calculator
Customer Review: Great assistant for higher math
Summary: 4 Stars
This calculator is a great time saver when it comes to doing higher math such as calculus or differential equations. I am currently an engineering major and for about 7 years, I was using the TI-82. It served its purpose, but as time went along, and the math got more complex, it took longer to solve problems with the 82. The 82 also required more and more steps to solve problems. With the TI-89, differentiation and integration are done with the touch of a button. I am currently taking a course on differential equations, and this calculator is a big help. When I need to integrate, I just type in the integral and hit enter, much quicker than paging through those integral tables trying to find the right one. This calculator also has a feature that will compute solutions to most first and second order differential equations. One drawback is that some integrals are too hard for this calculator and it cannot solve them, this is when you have to break it up or use a computer program such as Maple. Overall this is a great tool that I will use for a long time. I recommend this calculator to anyone in higher math, however I do not recommend it to anyone using it for courses before calculus because you will not be using the features that make the TI-89 great.Customer Review: Nice Calc, bad Company
Summary: 3 Stars
I purchased a TI 89 for school, not because I wanted too. It was useful, yes, but that is not my problem. I am interested in computers, and wanted to learn how to program on my calculator. I got bored with TI-BASIC (a slow, high level language that the calculator must convert to instructions it can understand before it executes) and wanted to learn Assembly, a language that directly controls the processor of the calculator. Well, it turns out that TI is VERY unhappy when people make the calculators do things TI doesn't want to do. They try to stifle most development for the calculators, and have gone so far as to place a secure key on their applications that they boast so much about, so only people who PAY TI can make Flash Applications. On the other hand, the HP 49G has all the features of the 89, but it Graphs 3d FASTER. surprisingly, it's processor is only 4Mhz. The TI, which has a 12Mhz processor, graphs SLOWER! TI is sorely inexperienced when it comes to making the Operating Systems for their calculators. Eventually, if TI gets their act together, we will see a good calculator that uses the 12mhz processor to it's full potential, and supports All development (like the Assembly Developers Kit produced by HP), but for now, buy HPCustomer Review: TI is serious about its calculators. HP is not.
Summary: 5 Stars
After a month or so of frustration with the HP 49G, I gave up and bought this one. I got it a few hours ago. I opened the manual (which is about 10 times longer than the HP49G's) and, at random, worked through some examples. To my surprise, they all worked: 3d graphs, intercepts, programming, factorization! The examples REALLY worked! Clearly someone needs to let HP in on this little marketing gem.If you want to know what TI thinks of its calculators, go to their website and look at what they have for the TI-89. Download and peruse the manual. Look at the free (and not free) software you can get. Check out the links. Get a feel for how serious they are about their product.
Then go look at what HP has for the 49g. It's pathetic. Try to find links *anywhere* on the web for the 49g. You won't.
20 years ago many believed that HP was the calculator for the "serious" scientist/engineer. If the HP49g is evidence, HP no longer has any interest in calculators.
I have no reservation in recommending the TI 89 to students, scientists, and engineers. I have already written some short programs, and am farther along after a few hours than I was with the HP after a few weeks. It's simply fun to work with the '89.
Customer Review: The best out of all the TI calculators.
Summary: 5 Stars
This calculator has put me ahead of the class in all my Calculus classes, there are many operations that it can do that the TI83 and TI86 cannot do! Such as derivatives, anti-derivatives, factoring, etc, etc. I've use the TI86 before and there is no comparison, I am now taking Discrete Mathematics, and this calculator helps me out every time. Most of my classmates bought the TI83PLUS or the TI86, and now they are all angry since they did not spend their money wisely. One of the other features is on the display itself; it is incredibly clear and very sharp. The menus are very easy to get around, and graphing is a snap. Everyone in my class loves the calculator! Some of the other things that it can do, is actually load games, like packman, asteroids, etc. There is a website that can help you get the most out of the calculator, with instructions on how to use it, plus many questions that you may have on how to perform calculus, or algebraic operations. It also gives you detailed information on the differences between one and the other, but I ask you to take my word for it. This is a "must have" if you have to take calculus or any other advance math class in the future; I hope this information was helpful!Customer Review: I REALLY wanted to like this so bad
Summary: 1 Stars
I just bought a TI-89 on the advice of others in my college in advanced math. I was so excited and I really wanted to like it. I mean come on, it has programming, games and applications - like a calculator should. But as with another review here I have to give it 1 star based on horrible craftsmanship of the LCD. The second I turned it on I realized:- THE ENTIRE DISPLAY IS SKEWED SLIGHTLY DIAGONALLY TO THE LEFT.
- THE LCD IS DIRECTLY EXPOSED, NO COVER.
- LCD DOES NOT MAKE USE OF ENTIRE SCREEN AREA LEAVING 3-6MM ON ALL SIDES YES IT VARIES BECAUSE THE SCREEN IS TILTED DIAGONALLY A FEW DEGREES.
Im sorry Texas Instruments, that is just unacceptable. I thought I had a defective product but now I realize all TI-89's have the skewed display. All I can think about when I use it is how annoying the skewed display is. For a calculator I could stomach a skewed display but the flagship TI-89?
TI is going to loose market share to HP if they don't get their act together. Their calculators are already half the power of the HP's best (which are nicely constructed), if only the dident require this in college classes I wouldent use it.