Difference between Ti-84 and Ti-89

Test Preparation SAT Subject Test Preparation
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<p>@lolilaughed
I've bought TI-89T as soon as it hit the shelves. To my dismay I discovered that the guidebook which came with the TI-89T was a joke; reading CD-ROM from the monitor is a pain.
After a bit of research I found that Texas Instruments sells a full size manual for "TI-89 and TI-92":
<a href="http://epsstore.ti.com/OA_HTML/ibeCCtpSctDspRte.jsp?section=10447&JServSessionIdrootdlek21=fqdj9g06g1.n6LzoN8L/AzOnMTOogTxpQOUtxCLbx0Ka0--%5B/url%5D"&gt;http://epsstore.ti.com/OA_HTML/ibeCCtpSctDspRte.jsp?section=10447&JServSessionIdrootdlek21=fqdj9g06g1.n6LzoN8L/AzOnMTOogTxpQOUtxCLbx0Ka0--&lt;/a&gt;&lt;/p>

<p>You can download it from Pick-Up</a> Window: TI-89 / TI-92 Plus guidebook.</p>

<p>You can also find TI-89 tutorials on the Internet.
I like this one:
<a href="http://www.nmhschool.org/academics/math/mat521/ti89_instructions.swf%5B/url%5D"&gt;http://www.nmhschool.org/academics/math/mat521/ti89_instructions.swf&lt;/a&gt;&lt;/p>

<p>"TI-89 for Dummies" came out in 2005. It has drawbacks, but serves a purpose.</p>

<p>Apparently there exist computer emulators of TI-89, but I am not familiar with them.</p>

<p>As far as Math 2 goes, I usually "solve" 2-3 questions.
"solve" function can even be used in symbolic mode, for example to find an inverse function:
y=(x+2)/(x-3)
"solve x=(y+2)/(y-3), y)" will give you y=(3x+2)/(x-1) in 2 sec.
"factor", "expand", "comDenom" are my other favorites.</p>

<p>With all that said, I believe that SAT is not an even playing field, and the CB allowing TI-89 is a good illustration. ACT does the right thing banning TI-89.</p>

<p>P.S.
The irony of progress: TI-84 Silver graphs faster than TI-89 because TI-84 has a lower screen resolution - less computation is required.</p>

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<p>^ Thanks, that was very helpful...</p>

<p>So the TI-89 has the biggest advantage for solving through factor etc?</p>

<p>Hm...is it worth the time expended learning the TI-89 or should I stick with the 84?</p>

23

<p>Use the one you're comfortable with.</p>

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<p>I think the CB (and ACT as well) are going to have an increasingly hard time deciding which calculators are OK and which are not. Unless there is some kind of collusion between TI and CB, the price of a calculator that can do symbolic math ( I assume that's the main problem with the 89 from ACT's point of view ) should continue to come down.</p>

25

<p>The 89 is nearly the same price as the 84 silver._.</p>

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<p>^ Yes, now I don't really think it's worth the time and money to try to learn the 89 just for a few problems..</p>

27

<p>for math ll, how many questions do you think we need to solve with a graphical calculator?</p>

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<p>anyone knows how to key in formula into the calculator?</p>

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<p>Does anybody actually have a helpful guide/thread for SAT II techniques with the TI-89 calculator?</p>

<p>I've searched already. Can't find any.</p>

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<p>I don't see how "symbolic math" would help on the SAT Math Level 2. I'm just sayin'. All the problems required very little "calculator" and mostly "brain".</p>

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<p>I am taking Math 1 and 2 again in December (I know, I could find better things to do on my weekends). I won't bring any calculator - my goal is to hit 200 this time.
Just kidding. I'll use TI-89. But I'll try to gather some statistics: on how many questions a graphing calculator is
1. benefitial
2. indispensible
and on how many TI-89 gives an edge.
I'll share my findings - unless the CB puts a gag order on me.</p>

<p>P.S.
If I start every sentence with an "I", it does not reflect very favorably on me, does it? :o</p>

32

<p>^ Thanks, gcf. @ Arachnotron, symbolic helps a lot. </p>

<p>I don't see the need to reinvent the wheel. Sure you know how to do it but it's better to do be able to punch in numbers, get the right answer instead of solving it manually.</p>

33

<p>Even if the 89 doesn't save you time and effort, it definitely gives you an edge as far as checking your answers.</p>

34

<p>That's true. I was actually thinking about bringing both the TI-84 and the 89 because 84 graphs faster/has faster progs.</p>

35

<p>If I already have a 83+ would it be a complete waste of money to get the 89?</p>

<p>I'm in my first year of calculus so that could come in handy...but what in the world would I do with 2 calculators??</p>

<p>But I would love a 800 Math II and 5s on my Calc AB and BC exams..</p>

36

<p>In terms of programs, the TI-89 does not have much support. It's only the symbolic function that really has any appeal in the Math II. If you have a 83+ and just bought it, there's no point. Calculus and engineering might require more advanced calculators like the TI-89 though.</p>

37

<p>^5 on AP Calc BC w/ TI-84</p>

<p>You don't need anything more advanced; I had plenty of extra time on the calculator section anyway. They make sure they're testing knowledge of Calculus rather than knowledge of your calculator.</p>

38

<p>^ What about for Math II?</p>

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<p>I got 800 on Math 2 also, but I also ran out of time and didn't finish. That may not be the best indicator though. I didn't take the test until June, when I was in Calculus (online), and my Precalc class was non-honors, so I didn't really learn anything. It had been two years since my last <em>real</em> math class.</p>