Do you recommend buying the "HP Prime Graphing Calculator App"?

[pinkman]

Yes I do recommend buying this app!
Having a high level calculation tool everywhere you go, easily connected with you other HP Primes including physical or virtual makes things easier.
I often program things on the fly, just to verify an equation, a formula, or simply derive something or display a sequence graph.

For everyday calculations like divide the bill at the restaurant, I use Free42. But for advanced calculations, nothing beats this $30 app.

Plus… you can copy / paste so easily using the lateral menu. I’m writing this on an iPhone, and to verify what I said I copied this small program, enjoy!

Code:


EXPORT TANSIN(S)
BEGIN
 LOCAL X1, X2, X, Y1, Y2;
 X1 := Function.Xmin;
 X2 := Function.Xmax;
 IF S≤0 THEN
  S:=(X2-X1)/320;
 END;

 RECT();
 FOR X FROM X1 TO X2 STEP S DO
  Y1 := COS(X)*(X1-X)+SIN(X);
  Y2 := COS(X)*(X2-X)+SIN(X); 
  LINE(X1, Y1, X2, Y2, RGB(20,10,10,200));
 END;
 FREEZE;
END;