<p>We were talking about this in calc class and we were wondering if you can find differentials(you know like the dy/dx stuff) with your calculator. I know there must be a way but I don't have my manual(I'm looking for it, but still can't find it) and am only finding partial answers through my searches...</p>
<p>Anyone willing to help?</p>
<p>(if if makes a difference, I have a ti titanium but I think it's mostly the same)</p>
<p>Thanks!</p>
<p>I love the TI-89! But sorry..can't help you with your problem..I'm not in calc.</p>
<p>I don't have a ti-89, and I think there's a way you can directly calculate differentials on it, but on my ti-83+ anyway you can find them by typing the equation into the y1= part as if you're graphing it, then on the main screen go math, scroll down until nDeriv, then put in the parenthesis y1 (get it by going to vars, y-vars, function, then y1), then a ",", then an "x", and then the value at which you want the derivative (looks like nDeriv(y1,x,n) where n is whatever number you want). same goes for integrals, but you have to put in 2 numbers obviously.</p>
<p>there is no program for that in the calculator but if you look at the texas instrumants calculator website there is a calcules program that i think will.</p>
<p>Easy</p>
<p>Turn on calc
press 'f3' > opens menu
first thing should be "d( differentiate"
Press enter
put in equation to be differentiated, i.e. 3x^4*sin(x) COMMA the variable (x in this case).<br>
terminate bracket, press enter.
Answer magically appears.</p>
<p>lol</p>
<p>If you don't know how to do that, why have it? :|</p>
<p>El1jah don't be so hard on the fellow, obviously he's only anovice</p>
<p>2nd -> 8</p>
<p>d(f(x),x)</p>
<p>if you want second derivative:</p>
<p>d(f(x),x,2)</p>
<p>anymore 89 questions? It's actually really funny, the TI-89. I bought the Titanium for my calculus class and at first everyone made fun of me callin' me a rich kid that has too much money to spend on $150 calculators. Once they saw I could do anything on it, they tried to get my teacher to take it away. He said no because 1) I could do it all by hand and 2) why should I be penalized because they don't go out and buy it themselves...</p>
<p>Now 8/11 kids in my class have it. it's pretty funny if you ask me. It sucks your brain though; it's worse than heroin. Now everyone uses it for algebra 1 things. So we all asked our teacher for TI-83s to do our work, because if we always used the 89, it would be our brains... </p>
<p>Random, I know.</p>
<p>I'm one of two kids in our calc class with TI-89s. Our teacher won't allow us to use it on tests :( But for classwork and homework, it's a great deal of help. Feels like cheating, though.</p>
<p>cheating? i dont think so. demoralize yourself i you want to, but dont declare it to the world so everyone feels bad : )</p>
<p>u people who don't know how to read a friggin manual.
i don't know why we have so many questions about how to do something on the the ti89. it's all in that book included.</p>
<p>tiggeruppercut: read the post... I can't find my manual. And for that matter, if the posts annoy you so much don't read them... and don't reply to them. </p>
<p>I know the functions that you've all mentioned but that's not what I'm looking for. I'll see if I can find a manual at school today. Thanks to those that tried to help.</p>
<p>what ARE you lookin for? Differential equations? Like with the whole slope field and what have you?</p>
<p>1.How can u find out the period in radians of a graph?
2.How can u find out the fourth term of (a-2b)^12?</p>
<p>Thanks a bunch!</p>
<p>I don't have a 89 handy, but for your second question, couldn't you just use the expand function and then scroll over to the fourth term? Or you can just do it by hand using Pascal's</a> triangle, though that would take a while to write out.</p>
<p>
</p>
<p>There is a generalized formula for finding any specific term in an expansion. I can either thoroughly explain all the theory behind it, or I can just give you the formula and apply it. I think I will just give you the formula and apply it.</p>
<p>nth Term in Binomial Expansion of (Ax + By)^Z =
zC(n-1)<em>(Ax)^(Z-n+1)</em>(By)^(n-1)</p>
<p>So</p>
<p>12C(4-1) * (a)^(12-4+1) * (-2b)^(4-1) =
12C3 * (a)^9 * (-2b)^3 = </p>
<p>-220 * a^9 * 8b^3</p>
<ul>
<li>Note, 12C3 is 12 Choose 3</li>
</ul>
<hr>
<p>Back to original poster's dilemma. I'm fairly certain TI has the manuals online for download. Let me check...oh look, here 'tis!</p>
<p>There are two guides there. One is a pdf of the printed manual, and the other is an extended online version with more chapters.</p>
<p>Thanks a lot !!!! How about the first Q?</p>
<p>hahha the ti 89 has saved me in almost every math class i have taken in high school. yeh i know its sad :(</p>