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Texas Instruments TI-89 Advanced Graphing Calculator
Product Review This advanced graphing calculator is packed with more features than you might know how to use. The TI-89 lets you perform the expected functions of an advanced calculator--basic math, algebra, calculus, graphs, matrices, and statistical functions. However, you can also do cool stuff like create animations as well as graph 3-D rotations and plot contours. The manual that ships with the TI-89 is a killer, presenting over 500 pages of clear, concise definitions, function explanations, examples, drawings, and appendices. It's divided into well-organized chapters that cover all the major features of the calculator. Graphing functions include basic function graphing, parametric graphing, polar graphing, sequence graphing, 3-D graphing, and differential-equation graphing. Additionally, the TI-89 includes symbolic manipulation, constants and measurement units, statistics and data plots, a numeric solver, a text editor, programming capabilities, tables, a split-screen function, variable management, and the ability to link to other calculators or a computer. The large, color-coded keys are easy to read and find--a nice touch on such a feature-heavy calculator. An improvement over earlier Texas Instruments graphing calculators is the addition of one-touch X, Y, and Z variable keys. The large LCD screen is also adjustable to your environment; we were able to view it clearly in a variety of lighting. The TI-89 comes with an attached, hard slide cover that protects it from getting knocked around in a backpack. The TI-89's flash technology allows you to upgrade to future software versions so you don't have to continually invest in new calculators. The whopping 500 K of memory is more than sufficient for your stored functions, programs, and data. You can also create custom menus or use the default menu. Another cool feature is the Program Editor, which gives you the ability to program. The TI-89 also comes with an input/output port and cable, letting you synch up with other TI-89s or TI-92s. --Jill Lightner Pros:
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Product Description MODEL- TI89GRAPHICS DESC.-TEXAS INSTRUMENTS GRAPHING CALCULATOR FEATURES- * Electronic upgradability of software including maintenance and feature upgrades. * Advanced Mathematics software functionality suitable for college mathematics and engineering coursework. * Symbolic manipulation for algebra and calculus. * Pretty Print shows equations and results with radical notation, stacked fractions, and superscript exponents. * Real and complex results. * Active home history screen can hold up to 99 previous equations for deep recall. * About 180K bytes of user-available RAM (memory). * 384K bytes of user-available Flash memory in the form of user data archive. * Graphs functions, parametric equations, polar equations, recursively -defined sequences, 3-dimensional surfaces, and differential equations. * Shows numeric evaluation of functions in table format. * Slope and direction fields for exploring differential equations. * Interactive analysis of function values, roots, maximums, minimums, integrals, derivatives, intersections, inflection points, and arc lengths. * Exact symbolic solutions to many 1st- and 2nd- order ordinary differential equations. * RK and Euler numeric differential equation solving methods. * Real time rotation of 3D surfaces. * View contour levels and implicit pl 
Reader Reviews 1) arithmatic calculator functions: cause I'm too lazy for 6*7 in my head 2) entry memory : ever forget how you arrived at your answer? Your TI89 stores up to the past eighty calculations you've done 3) graphing functions: oh so much easier to do math when I can see the problem... function, polar, differential, parametric, sequential, even 3D graphs 4) algebra support: x^3 + 42x^2 - 8x + 2.1 = 0 ... forget factoring by hand : x = -42.1907945554 of course! 5) data tables: set up matracies, lists, and other data stuff... 6) units: A MUST for a science student... put in all your units and it will convert them 7) Calculus capabilities: differentiate, integrate, find limits (and MORE) of functions you type in! 8) Numeric solver: type in your own equations and plug in the numbers... KE = 1/2 * m * v^2 9) Easy interface, very intuitive 10) Seemingly limitless capabilities: download programs from the internet and load them on to your calcualtor (my favorite: the Periodic Table, with lots of data on each element). (you need the TI-graph link for a PC-Calculator hookup) 11) You CAN use them on SAT1, SAT2s, APs, and many other standardized tests. 11 reasons doesn't come close to how much I love this calculator! If you are or will be taking any of these classes I highly recommend the TI-89 : Calculus I, Calculus II, Statistics, Physics, Chemistry, ... and beyond! Comment | | (Report this)
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