[RadPig94]

I've been using this a little bit now for equations and Trig, it definitely is better than the Texas Instruments TI-8x calculators, first of all it's free and has features that TI calculators doesn't have such as finding Area, Surface Area, and Volumes of some hard-to-do shapes; 3-d graphs; equations and much more (including simple math :roll: )


http://www.graphcalc.com/