Texas Instruments TI-89 Advanced Graphing Calculator by Texas Instruments
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Digital camera reviews of Texas Instruments TI-89 Advanced Graphing Calculator
Digital camera Review: A Beautiful Piece of Work
Summary: 5 Stars
It's the best calculator I have used.Digital camera Review: A Calculator Smarter than I Am
Summary: 5 Stars
Very nice. Excellent graphical output, lots of advanced functions, programming, data types, etc. If you are taking higher level math, I would highly recommend this machine. The AP Calculus test is designed for people with this caluclator. The only thing that it lacks is.... it won't play a little melody, no matter what key you press. I'll have to keep looking for that.Digital camera Review: A Calculator for scientific enthusiast
Summary: 5 Stars
I have used my TI-89 calculator for about three months. I bought that from Amazon.com because it's a lot cheaper than buying from a store near my town. I really like to use this calculator because it can show fractions like the way we write it in paper. That feature helps me to find what is wrong with my calculation quickly. It is also very helpful for students dealing with circle problems. The calculator allows the answer of a circle calculation to be printed in terms of Pi. I really suggest TI-89 for high school students or TI-92 Plus for college students. They are great for AP Math and Science classes. They are worthwhile tools for people who deal with science, engineering and mathematics.Digital camera Review: A Calculator for the Serious Mathematician
Summary: 5 Stars
Check with your instructors if you plan to buy this calculator for use in math if you only wish to fill your degree requirement. Many instructors are aware of the power of this calculator and may not allow you to use it on tests. (This calculator is a portable answer key to anyone who knows how to use it.) If you plan to fill your math requirements and move on, maybe the Ti-83 may be better suited because it is cheaper yet still a good graphing calculator.If you are in need of a portable math computer, or even portable math tutor this may be for you. It takes time to figure it out. The manual that comes with is a book, but it is an abridged version of the full manual, which is 600 pages. Once you get the hang of it (this could take days, weeks, or months), you may find that the format is so consistent that you don't need to consult the manual to learn new functions.
I have a second calculator to use on my calculus exams because this particular calculator is not allowed, but I find this to be a great answer key to even problems. I also use the algebra functions to break down calculus problems if I have trouble finding the answer on my own. To me the Ti-89 has saved itself its cost in solutions manuals - this is me and may not fit your study needs.
Since I keep 2 calculators, this one and a lesser calculator for may tests; I can see a vast difference. The Ti-89 is built mechanically as well as it is electronically. The display and format are very crisp and easy to use. Both my calculators get knocked around. My cheepy is dented a bit, but the Ti-89 is still like new. I've had this calculator for 8 months with continual use and the buttons are not even worn. If you use this calculator enough you may find yourself automatically using both your hands at once - this calculator is so fast and easy to use once you get the hang of it. The display gives an instant verification of your entry in a beautiful,easy-to-read format.
Digital camera Review: A Calculator that is King of the World
Summary: 5 Stars
The TI-89 is an absolute must have for anyone involved in college mathematics. Do not leave home without it. I have used the TI-89 in my Algebra and Trig classes. I will be using it in my Calculus class. Do not even bother with Casio.The TI-89 factors, solves equations, has x,y,z,variables, even solve matrices. You can't lose. L.Perez