Ti 89?

Test Preparation SAT Subject Test Preparation
1

<p>My school does not let me use the 89 in math classes, as they say it makes the course too simple - they want us to learn how and why it works, not just that it does work.
But the collegeboard tests allow it. I'm signed up for the Math II in June, so should I buy the 89 just for this test and all other collegeboard tests? I would be able to use it in ap physics c and ap chem senior/junior year...
I have no idea how the 89 works, but I learn quickly (and I'm a math/science person). I taught myself how to program on my 84 silver the night I got it...
And does the 89 actually give you an advantage on the Math II test?</p>

<p>Suggestions? Advice?</p>

2

<p>I also have this question.</p>

3

<p>I recommend against it. The math 2 is mostly a precalculus test, and TI89 is only really useful once you're in calculus. I believe you're a fast learner, but almost everything about the TI89 is different from your regular 83+ or 84. Just use the calculator you've been using in your math classes and studying with. Your time is better spent studying the actual math, rather than learning how to do stuff you already know on a new calculator.</p>

4

<p>I understand what you are saying, but many people have said that they haven't finished the Math L2 (and they're just as smart as me). And FYI, I'm a soph in PreCalc H now. I'm pretty darn good at math...
And what if I brought 2 calculators?
84 Silver for basic things
89 Ti for emergencies?
Thanks!</p>

5

<p>I want to do that since I know the ti 84 better, but I'm pretty sure you cant have two calculators out on the desk at the same time, and you can't switch between the two unless one of them malfunctions.</p>

6

<p>^that's totally true. </p>

<p>TI-89 saves me time on 3-5 questions (compare to TI-84) on Math 2 every time I take it. I'll check in June again.</p>

<p>PS<br>
I am a slow thinker. :(</p>

7

<p>Find an emulator online and see if you're willing to figure it out.</p>

8

<p>Ti 89 titanium is a true lifesaver.
believe me.</p>

<p>the only bad thing about it is that you have to know where the buttons are, if not, you will spend more time looking for which keys to press rather than tackling a problem. also, the SAT_OS program for ti-84 is better than the ti-89.</p>

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<p>What kind of lifesaver is it a problem on? Solving quadratics? Because I have a program on my 84 that does that.</p>

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<p>^ yeah i have SAT_OS for my 84 some of the stuff are pretty useful</p>

11

<p>You don't need a Ti-89. I and many other people I know got 800s with "just" an 83+ or 84...</p>

12

<p>someone stole my friends...</p>

13

<p>i swear by the ti89 just because of the multitude of functions it can do. F2-Solve is probably one of the BEST functions ever to be programmed into a calculator. It can solve almost any algebraic equation (including system of equations, up to 26 simultaneous equations/variables i think). it also has a bunch of useful functions in the graph mode such as intersection, zeros, etc (it also can do similar functions numerically). i haven't actually used any graphing calculators other than the ti89, but i once had to use a ti84 and i felt like it was almost useless, but that could just be because i had no clue how to use it at all. ti89 has multiple tricks (idk if they exist in ti84) such as restricting domains by using the suchthat key (|). the suchthat key rocks because if you have some huge equation with a lot of x's and u need to plug in a value for all the x's, you can just add |x=5 or whatever ot the end and it'll put 5 for all the x's automatically. it's wonderful. </p>

<p>as mentioned before, download an emulator and try it out. here's a link to an emulator i use when i'm home and i dont feel like wasting my ti-89's batteries, dont want to take it out of my bag, forget it at school, or want to do processor intensive calculations that would take long on a normal ti89.</p>

<p>TI-89</a> Emulator</p>

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<p>true.
once you unlock the power, you will be one very happy camper on any test dealing with Math, Chemistry, or Physics.</p>

15

<p>My math teacher went on a long schpeel today about how you don't even really need a calculator and almost all the problems have little tricks. If you can notice them, it not only saves time but it makes the test incredibly easy.</p>

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<p>^ You can definitely write the entire test and still score highly with a basic scientific calculator (e.g. no graphing functions, only your standard log and trig functions)</p>

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<p>of course its possible to score high with a basic scientific calculator, but thats only if you're VERY strong in math and are VERY comfortable with your scientific calculator. I personally would be able to take the test with solely a scientific calculator if I wanted, but I always work too fast and make some silly mistake - i like to be able to see my steps on the graphing calculator's screen.</p>

<p>Also, I received a PM asking for some help in the tricks i had outlined previously with the ti89, so i thought i'd post that here too:</p>

<p>To use the suchthat button, which is | on the calculator, here's the syntax:</p>

<p>expression|variable=value</p>

<p>so, say i wanted to plug x=2 into the expression x^2 + 2, u'd type this into your calculator:</p>

<p>x^2+2|x=2</p>

<p>It would then return 6 as the answer. </p>

<p>You can also do this with multiple variables, just separate them by the word "and", like so:</p>

<p>2x+3y|x=1 and y=2</p>

<p>That would return 8.</p>

<p>Now if you've ever tried to F2 solve trig equations, you'll know that sometimes it comes out really ugly with @ signs and n's and stuff. This is because trig is periodic and so there are an infinite number of answers. Here's how you can make it so it only returns answers between 0 and 2pi (assuming you're in radians)</p>

<p>solve(sin(x)=0.5,x)|x>=0 and x<=2pi</p>

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<p>for systems of equations and F2Solve, do it like this:</p>

<p>solve(x+y=2 and 2x+3y=15, x)</p>

<p>it will give u the answers for x= and y=.</p>

18

<p>TI-89 for Calc=life saver. It can integrade and find derivatives of anything. (unless you can't do it with regular calculus)</p>

<p>For SAT/ACT/SAT II Math 2, you don't really need it but it'll save you on at least 3 questions.</p>

19

<p>Thx popat!</p>

<p>Can other ppl explain their techniques for the 89?</p>