<p>Hey I just finished out my Elementary Functions (Pre-Calculus Advanced) at my school: The first three nine-week periods I got like:</p>
<p>90, 91, 92 (or so), then...</p>
<p>100% for the last nine weeks with 100% on the final - The TI-89 is so totally worth it! Go for it! :D :D</p>
<p>I have both the ti-89 titanium and the ti-83+.</p>
<p>Personally, i think the ti-89 is toooo slow. If you want to do basic calculations, just get a ti-84(upgarded ti-83). I wouldn't recommened it for standardized tests. </p>
<p>ti-89 does help if you are in a calculus(or higher) class. I only used it to check my work. I'll probably use it more when I get to college.</p>
<p>So hey4br,</p>
<p>Do you think I am beter off with Ti-84 then with Ti-89 if I only buy it for the SAT math 2c</p>
<p>yea, if you're getting it just for the math iic, a ti-84 would be better. You won't use the ti-89's extra features on the test. </p>
<p>If you're taking calc or a higher level math in the future, you might as well get the ti-89.</p>
<p>Did someone forget the all-powerful "auto-solve" feature? I don't believe the TI-84 has that... ;)</p>
<p>my suggestion is to use both the ti-83+/84 AND the ti-89 on the sat 2. Use the 83/84 for basic calculations because its much faster than the 89. use to 89 for finding roots and solving for x and y (using the solve function).</p>
<p>The Ti-89 is def. a MAJOR time saver...especially for problems where one must solve, simplify, and factor equations. The "isprime" function is also very helpful. The 89 allows me to usually have an extra 5-7 minutes left at the end of every math section to look over answers. Though generally easy to use, make sure that you have plenty of time to acquaint yourself with the calculator, otherwise it could hinder you more than it would help you. Take plenty of practice tests with the 89 and make sure you skim through the instruction booklet. The 89 is allowed on all SAT's and SAT II math sections, but is often not allowed in college/high school calc classes because it basicly does everything for you, though this is teacher specific, it is generally prohibited. If you dont want to risk having to invest in multiple calculators then i recommend that you buy a Ti 83+ or Ti 84.</p>
<p>ti-89 is only worth it if you know how to use it--takes a little practice to know the keystrokes, and speed is important</p>
<p>know the following essentials:
solve, factor, common denominator, differentiate, integrate, zeros, and how to use the | operator to specify domains</p>