A scientific calculator usually has special buttons for parentheses, trigonometric functions, exponents, inverses and pi -- among other things. A graphing calculator does even more.

Like textbooks, graphing calculators are still a necessary (and expensive) accessory for math and science students in high school and college. Sure, there are calculator apps for tablets and ...

Which Casio scientific calculators are best? You will probably need a Casio scientific calculator at some point in your educational journey to help you figure out formulas, equations, variables ...