Functions can be used by inserting the name of the function followed by function arguments. Calculator also support userdefined functions. If the argument is not a number or a single variable then write each argument separated by semicolon and use parenthesis around the argument list.
sin 30
abs (5−9)
fun (9;10)
To add a new function type the function in the format as given below. A function name and arguments must only contain upper or lower case characters. The part after @ is the function description which is optional.
SimpleInterest (principal; rate; time) = principal * rate * time @ Simple Interest formula
Functions can also be added and inserted using the f(x) button.
Click on f(x). Type the function name in the box, choose the number of arguments and click on the plus sign button next to it. On the calculator screen type the function expression and press Enter.
Click on f(x). Choose the function and click on it.
The following functions are defined.
abs 

ceil 
Ceiling 
cos 

cosh 

floor 
Floor 
frac 
Fractional Component 
int 
Integer Component 
ln 

log 

not 

ones 
Ones complement 
round 
Round 
sgn 
Signum 
sin 

sinh 

sqrt 

tan 

tanh 

twos 
Twos complement 
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