Texas Instruments TI-89 Advanced Graphing Calculator
by Texas Instruments
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List Price: Our Price: $67.99 You Save: $122.01 (64%) Availability: Usually ships in 1-2 business days Category: CE See more product details |
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Digital Cameras Photo Reviews of Texas Instruments TI-89 Advanced Graphing Calculator
Customer Review: Prestige Calculator For High School And College Use.
Summary: 5 Stars
I just recently bought the TI-89, and I was amazed by it's power, and capability's. My father thought the TI-89 wouldn't inprove my math grades, but ever since I got the TI-89 I haven't gotten any thing lower than an A. Meaning that I only get A's on my math tests, and quiz's, and my report card grade is also an A. The TI-89 is truely a must have instrument. I am far ahead of my class mates with this calculator. Every parent which wants there child to succeed in any math cource should definitely purchase this calculator for there child. My dad was a non believer in this calculator, but now he regrets not getting me the calculator sooner. This is truely some thing that you should not miss out on, and you will not regret purchasing this calculator.Customer Review: Simply the best
Summary: 5 Stars
Overall the TI-89 is better than the HP-48GX. It's symbolic capabilities are much better; it is much friendlier, and it is better for programming. In fact because it is a nice high level programming environment, it is very useful when you have many complex programs to write. I have found the computing speed to be quite good (despite what another reviewer said (who is too sophisticated to use a high level language)). In fact I wrote a slow-down subroutine simply so I could see the output. The reviewer who said that sec, csc, and cot had been "renamed" obviously does not recognize the hyperbolic trig functions. Lastly, the same reviewer said it would not give the lim as x goes to 0 of cos(x)/x , but that goes to infinity!Customer Review: The best calc ever made
Summary: 5 Stars
I never knew that math could solved so quickly and easily. The TI-89 has a vast array of functions that easily cover everything from statistics to differential equations. The Computer Algebra System works great and really helps when solving problems with unknown variables. The built in list of units helps when converting one thing to another. If you are going to take any math courses in the future, the TI-89 will easily take you through them. The games that are available for it are incredible. You could spend the first half of class zapping the math and the next half playing tetris! All of these features combine to create the ultimate calculator. One that can do all the math and still entertain you on the side.Customer Review: Best Calculator EVER.
Summary: 5 Stars
I almost exploded in laughter when I opened the packaging on this calculator. The enclosed manual was thicker than the one for my car! Not only that, but when I read about and tried the solve and factor functions, I was never more amazed. The best thing is, that you can punch in a problem like 4(37x+93)^2=24 and it will solve it in a manner of seconds, much quicker than I could ever hope to solve a problem. (not like that one's particullary difficult, mind, I'm only using it as an example) I will say that the only difficulty with this calculator is that programs written in the *.89p format are not compatable with any other model, so I am unable to share games or apps with friends. This calc's pros completly mask it's cons.Customer Review: Best piece of electronics I have ever owned
Summary: 5 Stars
I got this as a junior in high school. I'm now a junior at one of the service academies. I think I've had to replace the batteries once in that 4 year time frame. I am an operations research major (read applied math...), and this calculator has absolutely everything needed for any technical major. Being able to integrate is real helpful when you want to prove something works to yourself, or just check your work. The 3-d graphing is also amazing. I used to have all the games on it, and they work fine. Don't get this to pass time in class... a palm pilot has better apps. If you have any aspirations of being an engineer or math major, this calc will help tremendously. Definately worthy of your hard earned $$.