EasyCalc for Palm OS is premium application but you can download as freeware. Easycalc is calculator with matematical graphics, finance option, number conversion and complex numbers. You’re never do manual calculate. You just enter a formula, press the Execute button and you can read the result. Simple but it work with complex calculate.
Here complete feature:
Normal, Scientific and Engineering floating point mode
· All functions you would find on a normal scientific calculator
· Unlimited number of variables and functions
· Graph support
· GuessIt function – it tries to find out, what the result means, like “pi/2″, “e^(3/4)” and “47/23″.
· Integer operations (unsigned 32bit), conversions between Bin/Oct/Oct/Hex
· Function solving through fzero’ with three parameters – min, max and function, it solves the function (e.g. fzero(0:10:f()), with f()=”x^2″ will return ‘2′.). It is possible to write fzero(0:2:”(x-1)(x+1)”) too.
· Up to 15 decimal digits
· Scrollable results field
· Complex numbers, including a basic guessit for complex
· Fast menu for selecting variables and functions
· Results history

· Normal/Polar/Parametric graphs
· Tracing of graphs in all modes
· Table mode for graphs
· A reduced version of EasyCalc without graphs and special functions. You’ll save about 140K of space.
· Popup-menu for built-in functions
· If you select text and press a function button (e.g. sin), the selected text gets inserted as the functions argument.
· Export to memopad.
· Function/variable name consist of lower case letters ‘a-z’ and numbers and have to start with a letter.
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