<p>I borrowed a TI-89 from one of my friend for the Math IIc. It is really different from the TI-83+</p>
<p>What functions, keys, etc do I need to know for the math 2c so I can focused on learning how to use them?</p>
<p>What is very useful about TI-89?</p>
<p>i have used a ti83+ all my life, and yes i wanted to use ti 89, but really on math 2c, its no use, time is most important fator, its easier to take the test with ti83+(less complicated if ur used to this calc) and work more without using the calc. u could leave 8 blank and get perfect on 2C. so dont use a calc, its not worth it</p>
<p>twilightdarling - ask anybody who've used TI-89 on SAT Math Level 2 - they will never go back to TI-83/84.</p>
<p>The most useful function is "solve": you don't need bother with graphing to find the riits of equations.</p>
<p>Two others - "expand", simplifies algebraic expressions, and "factor" - does just what it says.</p>
<p>Try it on various practice tests you can find (I suggest "Real Subject Tests" and Spark Notes: similar to real content but about 50 points easier).
You'll see that TI-89 might save you up to 5 min.</p>
<p>A good book for mastering the basics was published in August - "TI-89 for Dummies"
<a href="http://www.amazon.com/exec/obidos/tg/detail/-/0764589121/qid=1129648810/sr=2-1/ref=pd_bbs_b_2_1/104-7544205-8546330?v=glance&s=books%5B/url%5D">http://www.amazon.com/exec/obidos/tg/detail/-/0764589121/qid=1129648810/sr=2-1/ref=pd_bbs_b_2_1/104-7544205-8546330?v=glance&s=books</a></p>
<p>More condensed explanations are on
<a href="http://education.ti.com/us/training/online/free89tutorials.html%5B/url%5D">http://education.ti.com/us/training/online/free89tutorials.html</a> .</p>
<p>matrices, you have to input them through the data editor, kind of a *****.</p>
<p>First I would like to say that on any math test, you should probably use the calculator you are most comfortable with. </p>
<p>With that said, I agree with gcf. The most useful function is solve. However, when I took the Math 2C, I found that I really didn't need my 89 except for three of four problems. It depends on how many little tricks and formulas you know to begin with.</p>
<p>I have an 89, but i would have happily used an 83 for the test. To me the point of an 89 is for its engineering capabilities and the <em>drool</em> ability to take indefinate integrals(this made the AP Calc exam so much faster)</p>
<p>I am also confused on whether I should use a TI-83 or TI-89 on
Math IIC. I used TI-83 all last year in Statistics, but this year, my experience is all about TI-89!</p>
<p>i guess you can't use two calculators for the test. lol. </p>
<p>oh well... i have been using the TI-89 for my calc. class but I use my TI-83+ for my stats class cuz it is such a hassle entering list on the 89. </p>
<p>i am torn... but I love the exact function on the TI-89 (it gives you radicals!)</p>
<p>i used the ti-89 tit. and i couldn't find the log key and when i typed in sin 60 (hoping to get the decimal value) it showed up saying sin 60. I was ****ed.</p>
<p>yea, i had the same problem while doing my calc homework then i realized you can change it to approx().</p>
<p>i have yet find the log key tho.</p>
<p>You don't have to input matrices through the data editor, rage_fan. Try entering them like this: [a,b;c,d].</p>
<p>But twilight, I wouldn't reccomend using the 89 for IIc unless you're very familiar with it by the time you take the test.. There are some features that can make your life a lot easier, but there are also some features that can make life a lot harder for someone who's used to an 83.</p>
<p>To enter log you can either go through the catalog or just type out "log"; it's short enough. I also installed an autocomplete app that lets you just type the first few letters of a function and it'll offer to complete it for you. That and a program that completes missing parentheses on functions also drastically improves my speed.</p>
<p>To get an approximate answer, hit the green diamond key, and then hit enter. There should also be an option in the settings that lets you either do auto, approx., or exact. Auto will simply simplify an expression if there are no decimals. If there are any, then it will answer in decimals. Auto is most convenient as you can just enter sin 60. with a period, and it'll give you an approximate answer.</p>
<p>Like I said, if you don't know how all the functions of your calculator work, then you need to spend some time "getting to know" it by reading the manual. </p>
<p>To get sin(60) as a decimal, you need to type it in and press the green diamond and then enter. It could have also been that you were in radians and needed to switch to degrees.</p>
<p>There is no log key. You must go into your catalog and get it there. But the answer will be in natural logs, so you must press the green diamond before you press enter.</p>
<p>Personally, I found the 89 very useful in my pre-calc and trig class. Please do not think that it is only good for calc and beyond.</p>
<p>how did you install the autocomplete app and the missing parenthese (i always forget them)?</p>
<p>thx for the feedback. i will how comfortable i am with the 89 in a week or so.</p>
<p>more suggestions/help/feedback?</p>
<p>oh, cool, thanks.</p>
<p>I have a friend who just took the test with a ti-89, he purchased it 4 days before the test, I can post on Monday with what his test score was.</p>
<p>I find myself constantly putting everying in decimal e.g: 8.0 when inputting things in the ti-89 to avoid the Green-Enter technique, I just can't stand that.</p>