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 $68.17 (click here) Category: CE See more digital camera details and other models |
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Digital camera reviews of Texas Instruments TI-89 Advanced Graphing Calculator
Digital camera Review: A Calculus Student Must-have
Summary: 5 Stars
This Calculator absolutely does it all! It's ability to find derivatives and antiderivatives (which the TI-85 cannot do) as well as many other calculus functions is invaluable. In calculus, I was always far ahead of my class due to this calculator! In statistics, its tables and graphing is extremely easy to use and its statistical summaries are much easier to access and read than those of the 83 or 85. The pretty print feature makes finding mistakes and reading the answers much easier. The graphs (3D) are far superior to that of the TI-83 or 85. I would recommend this calculator over the 92 for high school students due to the fact that the TI-92 (with its QWERTY keyboard) is not allowed on the SAT I or II tests or AP tests. The TI-89, with very similar operation and features, is allowed on these tests. For more information...e-mail me.Digital camera Review: A Must Have
Summary: 5 Stars
I'm an engineering student and this calculator is the best. It's basically the same calculator as th TI-92 but in an easy to use small package. It's great for entering in long equations. The pretty print shows you if you entered it in right. It finds derivitives and integrals in terms of x and it can find infinite series and limits. Go and buy one. This calculator has saved my life!Digital camera Review: A Portable Math Computer
Summary: 5 Stars
This calculator does it all. It will solve, factor, and graph any equation (please read the description for all details). It gives answers in exact form (with radicals and trig functions) or decimal form (rounded). It is built the same as the Ti-83, so it is just as durable.If you plan to go only to Calculus I the Ti-83 should do the job. The Ti-89 is designed to go to Calculus II & III. It has many math functions beyond the Ti-83
I like the display of the Ti-89 over the Ti-83. The detail is much finer and menu tabs are at the top of the screen; the pixels are smaller and the screen much sharper.
This calculator can be a crutch, but I am under the philosophy that once you are sure you can do the equations without this calculator, you are ready (grown up enough) to use this portable brain. Everyone (yes everyone including all my instructors) are susceptible to the slop factor - flubbing basic math, not carrying over minus signs. etc. etc. etc. (you know what I am talking about). This calculator is great to check your work on tests. You need to do it first on paper to check it. I also keep a smaller scientific calculator handy when I feel I may use the Ti-89 as a crutch to avoid the temptation.
I also found this calculator to be a great tool to open doors of understanding. I have looked at graphs of equations in my text books and put in what I thought to be the correct equation. I was able to figure out where my textbooks were poorly written in areas and have my instructors agree with my findings. This calculator has never been wrong. It is also a great tool to verify your test books are correct, and it is very useful to break down and verify parts of equations you need help on.
My calculator came with an abridged manual. The complete manual is on line. Chapter 2 covers the functions of the calculator with an example. The full manual has a chapter for each function with all the fine details. When I first bought the calculator I was not sure how to use it, but after going through the abridged manual several times and covering the chapters from the full manual on functions I use most, it is quite easy to use now. The notation makes sense and is easy to learn.
Digital camera Review: A calculator that is to good
Summary: 3 Stars
For computation ability this thing does deserve 5 stars, but this thing makes you dumb if you use it. I used to be a great math student then I started relying on this dumb black box and I have problems with even simple things like the quadratic formula(ok maybee not stuff that simple, but you get the point). Perhaps losing a $150 adding machine was the best thing that ever happened to me, now i'm starting to learn how to do this stuff with my own calculator (the human brain). I really reccomend that you only use this calculator on tests or quizzes, for everything else like home/class work just use a scientific. Trust me on this one ok guys.LOOK OUT GUYS I'M BACK! (guys being the other students in my math class).
Digital camera Review: A great calculator—available at a great price…
Summary: 4 Stars
I have used several graphing calculators in the past several years, including the TI-82, TI-83, TI-83 Plus, and an older HP calculator.This calulator has great features—it's extremely easy to use with pull-down menus and many shortcut keys, and it has power to do much more complex problems than any calculator I've tried, with the possible exception of the HP. It is exactly the same as the TI-92 Plus—it even has the same manual. There are two small differences—the 92-Plus has a qwerty keyboard and the ability to do geometry. Unless these are extremely important to you get the 89.
On the downside, I was disappointed to find that it does not have sound…or if it does, I haven't heard it yet. It is advisable to be careful of third-party games—the more complex the calculator, the easier it is for something to go wrong, and I have had to reset my memory once. If you have important info on your calculator, BACK IT UP before installing a new game.