It is excellent for mathematical programs, though. It is faster than any of the other calculators, until of course, you look at the HP prime (400 MHz ARM— it is faster than the laptops I had growing up and would probably rival my current computer with certain operations).

I did have to program some functions, like the Gamma and Riemann Zeta function as I needed to work with those. I also made a program to generate exact values for sine and cosine, I never finished my Simplex Algorithm program, and I have a bunch of other simple functions and programs. I do like the numtheory package, but I can't remember if that was included or not.

]]>The screen resolution of an iPhone 3 is 380x420 (3.5" diagonal). ]]>

Setup

General Setup

Set Calculation mode to Approximate.

I was using it for the first time on a Stats exam and could not figure this out!

]]>1) If you want a decimal approximation, press Ctrl and then Enter.

2) If you want pretty print fractions, press Ctrl and then the divide (÷) key. This will produce a fraction template.

3) The = button can be used for both boolean checks and entire equations. If you want to solve an equation with your calculator, type this in:

solve(*x*^{2}-3*x*+2=0,x)

Then, hit enter.

4) The solve() command will handle fractions as well.

(1)\begin{align} \rm{solve}\left(\frac{x}{9}=-\frac{5}{4},x\right) \end{align}

Hope this helps!

]]>So I went out and got myself a new calculator, and for some reason I got the nicest one available; the TI-nspire CX CAS and I am utterly lost. Please excuse my ignorance, I'm about to ask some extremely stupid questions:

First of all, how you divide?!?! When I try, it gives me the answer as a reduced, improper fraction. How can I convert that to a decimal? Or is there a setting I can change to do it automatically.

Similarly, how do I add/subtract/multiply/divide fractions on it? To make the line between the numerator and the denominator is it just the ÷ key?

Also, I see that there is an "=" button that doesn't actually solve math problems, like the Enter button does. This leads me to believe I can enter entire equations and have the calculator solve for x. Is this true? And if so, how do I accomplish that?

Finally, will it/how do I get it to do fractional proportions? For example, what buttons would I press to solve this:

x = _ 5

9 4

I apologize for the many stupid questions, thanks in advanced for the help!

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