Texas Instruments TI 89 Titanium Calculator
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- Programmable graphing calculator.
- Electronically upgradeable graphing calculator allows you to have the most up-to-date functionality and software applications.
- 16 preloaded graphing calculator software applications suitable for college math and engineering coursework.
- Memory management to create folders for specific applications or subjects.
- Icon desktop for easier access to applications and editors.
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Electronically upgradeable graphing calculator allows you to have the most up-to-date functionality and software applications. 16 preloaded graphing calculator software applications suitable for college math and engineering coursework. Memory management to create folders for specific applications or subjects. Icon desktop for easier access to applications and editors. Pretty Print shows equations and results with radical notation, stacked fractions and superscript exponents. Permitted for use on many state and standardized tests. Power Source(s): Battery; Display Notation: Graphic; Display Characters x Display Lines: 160 x 120; Memory: 188KB RAM; 2.7MB ROM.
Top customer reviews
I read all the specifications and reviews on Amazon and eventually decided that the TI89 was the calculator for me.
Unfortunately the problem with buying on-line is that sometimes you need to see, touch and hold a product. When I received it promptly in the post, I was not blown-away after I took it out of the packaging. However it is a calculator and it is fine if it looks and feels like a brick ( the computing power has to go somewhere). What I don't feel is fine, is that the screen is terrible, when I am sitting at my desk late at night doing some mathematics, I find it a real strain to see, I have to prop up the calculator at an angle so I can look directly at it. If the TI 89 is flat on my desk, the dot matrix screen 'ghosts' and you see a blurry line or numbers. Because so much information is packed into the screen, this is completely impractical and makes it's use a real chore. If I was writing this 12 years ago, I would not have this as a complaint but technology has come on so far now that I do not think that even a calculator should remain stuck in the past.
On the plus side, it is very powerful and I have enjoyed finding out what it can do. It is just a pity that it is not more pleasurable to use. I actually revert back to my trusty Casio fx580 which prior to buying this TI 89, I thought had a 'dull' display, in comparison, the Casio is like a christmas tree!
As I'm doing a Mathematics degree it is the perfect calculator as there is nothing it cannot handle (at least nothing I've covered so far).
It is not suitable however for GCSE and A Level (most exam boards) as it has an extremely good algrbra package, which is not allowed in these exams.
I bought mine and found that it was 'eating' batteries i.e. complete set in less than a month. But i have discovered that its mathematical skills are due to a customized, 16-32 bit, math processor made by Toshiba that allows it to steam along to solve problems rather than save batteries!
The thing you notice first is the smallness of the characters on the shades of gray screen. So you need a bright light to work with this device. The device has a mini USB port to allow connections with computers for sharing data and updating its capabilities.
The help is on CD in PDF format and really you need any convenient computer to look at it. The help is detailed and fine, but you may need to boost your mathematical comprehension to make the most of it. The help is there if your willing to find it yourself.
Updating TI89 software
The nice things you can-with separate 'silver link' USB-jack cable from TI for around £24- update the operating system then customize the applications (available online) you want to work with. But I would like to add that you might need to register with the ti nearest to where you are?
For example, I ignored the low battery warning and I noticed that the Home screen would go blank mid-calculation. To cut to the chase, I needed to reload the free applications available with the TI-89 from TI website. Once you download the 'T.I Graph link v1.6' for Windows (in my case) and install, its straightforward to update applications as its drag-and-drop. The calculator feels well engineered in you hands.
The main screen is one of the many areas for your calculations using the C.A.S (Computer Algebraic System). As there is so many commands and functions many of these need to be accessed by a catalogue button or math sub-menus. Many functions are available and it's worth having a browse. The nice touch is that when you select the function, a reminder of the syntax is shown to help you out. You will find that many have similar syntax, so you tend to find using them has common rules. For example, the nice thing is they can be piped together, e.g.to obtain the real part of partial differential of a complex Taylor series is easy when you grasp the syntax!
The usage of `cut and paste' is great when manipulating accurate copies of commands. The calculus handling is extensive allowing limits, differential and integration, summations and products etc. The complex number handling is impressive both graphical terms and numerically.
The matrix handling of the TI-89 Titanium is much improved. The data entry for example is has visual reminders and makes a more accurately and less confusing time. Their ability to use eigenvectors as solutions to matrices problems is great. You can apply Gaussian eliminations techniques in several forms, from single operations or solve at once
The graphical capabilities of this are stupendous, functions, implicit, polar, and differential, etc 3d real-time rotation of surfaces in shades of grey is fine although it may take a minute or two calculating the original. Also note that lots of this intensive modelling has a hit on your batteries. Using the wide-ranging differential capabilities uses separate modules linked together that allow their generation, on screen. When you first see this it looks fiddly to set up, but you get the knack over time. You can generate tables to analyse the results that is helpful.
I am glad I bought this device. If you have not seen what top-flight graphical calculator is capable of then you're in for a treat. I.M.H.O I do not recommend choosing this device to help you complete say G.C.S.E or A-level, as its capabilities may overwhelm the skill base at this level. If your using it a lot i would recommend eight, AAA, 1000mA, rechargable batteries to keep costs down. This is, using 4 AAA, and charging the other 4 AAA.
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