TI89 Graphing Calculator
Posted by in Graphing CalculatorTexas Instruments TI-89 Titanium Graphing Calculator
Before I bought a TI-89 Titanium, I had used a TI-83 Plus for four years. After taking calculus and learning about limits, derivatives, integrals, infinite series, Taylor series, differential equations, and multivariable functions, I decided that I would look for a calculator which was capable of symbolic computation. After analyzing my options, I decided on a TI-89 Titanium. The TI-89 Titanium is able to expand polynomials, factor polynomials, and do all of the calculus techniques that I mentioned — symbolically and numerically. One of the other things I found helpful was the TI-89 Titanium’s ability to plot direction fields using different algorithms (including Euler’s method). One of the nicer things about this model (compared to the TI-89) is that it has USB connectivity (cord included) for installing applications and transferring data. Another nice thing is that it also supports connectivity to older model TI-89s via the old I/O port which is right next to the USB connector. I also found the “exact mode” very useful (exact mode will give you exact answers rather than decimal approximations). Yet, the most useful feature of this calculator is probably the “pretty print” feature which displays expressions as you would normally write them on paper. This feature allows you to easily see the expression that you typed in. All these features plus copy and paste ability make this calculator nearly perfect. My only complaint is that the cover does not initially slide on and off easily. However, I’m sure that with more use it will wear in. Overall this is a great calculator — I recommend it
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Texas Instruments TI-89 Titanium Graphing Calculator
The TI-89 is an excellent calculator. It has an absolutley HUGEfeature set, and is so advanced that it can basically do most math for you. My favorite features are the CAS (computer algebra system), which can solve a lot of algebraic equations for you, and the factoring function (I dont have to waste time factoring on paper anymore! whoohoo!). My old ti-83+ seems like a slide rule compared to this thing, but the 89 is still quite easy to use. In addition, not only is this calculator great for math, its great for games! There’s a multitude of mathematical programs and games that you can find for free online. . . The only downside to this calculator is that the rich feature set can actually be a problem. A lot of students that use this calculator rely on it too much, and some of them barely understand any of the math that they are supposed to be learning. It is probably for this reason that it and its brother the TI-92 (difference between the TI-89 and TI-92 is the 92′s qwerty keyboard, useless for a calculator in my opinion,and the 89 is smaller) are banned in some colleges, and on some tests, like the ACT’s. If you’ve got the discipline not to rely too much on this fine piece of equipment (if you’re a student), I highly recommend this calculator. But be warned, keep your old calculator around for tests that you can’t use your 89 on, and NEVER rely to much on it.
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Texas Instruments TI-89 Titanium Graphing Calculator
Calculus is easy for this graphing calculator. It finds derivative, limits and tons of other calculus. It can graph piecewise functions which is helpful. It can factor and solve quadratics, quartics and higher. Get it; you’ll fall in love.
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