<p>Screw e-bay. I always get ripped off on that site. Amazon is the only online site I trust.</p>
<p>MGS, don’t you have to use logs, trig functions, and matrices a lot in calculus? Seems like a graphing calculator would be useful for that.</p>
<p>You can use a scientific calculator for that too.</p>
<p>I didn’t use matrices at all in calculus, other than for the purpose of taking determinants.</p>
<p>Other engineering classes, yes. That’s when I use Matlab.</p>
<p>^ I agree!!!</p>
<p>TI-89 is wasteful.
If you ever need a graphing utility that is required in class, and can be used during examination , you have to check it with your professor.
Othewise, from what I know, many colleges today prefer and prohibited students from using calculator in the math courses.</p>
<p>In our school, we are not allow to use calculator. It sounds stupid, but it really helps you to develop your mathematic skills.</p>
<p>If you ever need to do anything that is complicated, I think Matlab and wolframalpha.com handle better than your TI-89 or iPod touch.
To find all extrema for this function will take you forever: f(x,y) = sin(3<em>y-x^2+1) + cos(2</em>y^2-2*x)
Matlab can find them in 5 seconds.</p>
<p>I would stick with TI-83 if you don’t need it in an exam.</p>