<p>TI-89 Titanium rules them all. I'm almost done with the owner's manual. This calc. has unbelievable features on it. Does anyone know any other calculator that could be better than this one? I looked around, and it seems that Texas Intru. have the best, unless, of course, one would built their own one. :)</p>
<p>The only thing that is bad about the 89 is that some teachers will not let you use it. Also, It is not allowed on the ACT. This is largely due to the factoring programs and its Computer Algebra System (CAS). I have the 86, which is allowed on everything and by all of my teachers. It can't factor, but it can find real and imaginary roots of polynomials, solve equations, and solve Ax+...Cz=D systems of equations. It's not as user friendly as the 84 plus, but you don't sound like you care about that.</p>
<p>Omg why is the owner's manual so short? The one for the TI-83 I was like a billion times longer than this one.</p>
<p>I agree with DMRenrel.......The 89 Titanium requires a lot of practice to actually be able to remember where all the menus are and everything. I'd take the 84 over it anyday.</p>
<p>What is wrong with actually knowing how to do it rather than using your calculator. </p>
<p>BTW I can barely remember how to do things on mine... Definitely TI-84 over TI-89.</p>
<p>and 89 isn't allowed to be used for some exams, which is bad.</p>
<p>saying that the ti-84 is better than the ti-89 just because you haven't bothered to learn the 89's features is like saying walking is faster than driving because you haven't learned how to drive a car.</p>
<p>for real, though - the 89 is extremely useful.</p>
<p>^ possibly too useful... I'd rather learn the concepts of how to do it rather than how to make my calculator solve it for me!</p>
<p>I have a program on my 84 that factors...is that illegal? :/</p>
<p>illegal in what?</p>
<p>I'm still repping my TI-83!</p>
<p>My college wont let me use my 89 :(</p>
<p>First, one would be able to take the new silver ti-84 and program it to do factoring and other functions, which is technically the same as the already installed progams in the Ti-89. Thus, it's nonsense to ban the TI-89 from particular classes. </p>
<p>Second. Can't remember the menus and features? You get used to it, since everything is easy to find once you'll use it in class. </p>
<p>Third. For the ACT, one doesn't even need a calculator (maybe for several problems), but everything is commen sense on the exam. The problems are also quite easy, which allows a student to do them in his/her head. The TI-89 is allowed on the SAT and AP exams.</p>
<p>Fourth. The owner's manual is not short, over 1000 pages. There are three different owner's manual. </p>
<p>Fifth: I seem to retain all the information on the caculator, since it's like programming a computer (if not much easier). I'm not going into the computer programming field. If you memorized and practiced the features on the TI-89, the TI-84 seems to be quit basic. </p>
<p>Sixth: Too usefull in solving problems? Yes, I would definitely agree not allowing the caculator to do all your homework, since your cheating yourself. However, it has some amazing graphing features, and menus that not only make math easy to learn, and understand in math in depth, but also evaluate basic functions that saves time. In other words, if you thoroughly know your rules of math, etc., and want to use to caculator to understand caculus, graphing, and math in much depth and efficiency, I would recommend it. </p>
<p>Finally, the TI-89 gives you the edge in math and engineering classes, which overall, allowed me to understand math and science courses much effectively .</p>
<p>How do you/What are the inputs for the taylor series for the 89?</p>