Calculator Arity

Arity Calculator was written by Mihai Preda, and is open source.
It uses the "Arity" arithmetic library.
Android 4.x by Naik.
Special mod for KI-14-1 : ) Enjoy!
Sample expressions
simple expression: 1+2
variable evaluation: pi
function evaluation: sin(0)
variable definition: a=3.5
function definition: f(x)=x^2-1
parentheses: (1-x)^2
To enter an expression cointaining letters, such as sin(x), use the key on the basic keypad.
It toggles opened/closed the letter keypad.
Predefined functions
Logarithms and power
sqrt(x): square root; x^0.5
cbrt(x): cube root; x^(1/3)
exp(x): exponential; e^x
log(x), ln(x): natural logarithm
log2(x), lb(x): binary logarithm
log10(x), lg(x): decimal logarithm
log(base,x): arbitrary base logarithm
Trigonometric - radians
sin(x), cos(x), tan(x)
asin(x), acos(x), atan(x)
Trigonometric - degrees
sind(x), cosd(x), tand(x)
asind(x), acosd(x), atand(x)
Hyperbolic
sinh(x), cosh(x), tanh(x)
asinh(x), acosh(x), atanh(x)
Other
gcd(x,y): greatest common divisor
comb(n,k): combinations
perm(n,k): permutations
min(x,y), max(x,y)
floor(x), ceil(x)
abs(x): absolute value
sign(x): signum
rnd(): random value from [0,1).
rnd(max): random value from [0, max).
gamma(x): (x-1)!
mod(x,y): modulo
Complex numbers
i or j is the complex base.
Example:
i*i
(1+i)^2
e^(i*pi)
Operators
+ - basic arithmetic
^ power
% percent
! factorial
# modulo
square root
' first derivative
Tips
Parentheses: you may omit the leading or final parentheses, e.g.
1+2)(3+4 is valid.
Multiplication: you may omit the multiplication operator when unambiguous, e.g.
3+2(1+2)
Expression continuation: starting a new expression with an operator auto-inserts ans, the result of the last expression.
Clear: use the Enter key to quickly erase the whole input line.
Scientific e notation: 1e3 is 1000.
Angles in degrees instead of radians: use either sind(90) or sin(90deg).
Use trackball Up/Down to navigate the history.
Derivative
It is possible to compute the first derivative of a function with one argument using the prime notation: log'(5).
The prime mark (quote) must appear immediately after the name of the function, and must be followed by open-parentheses.
The derivative may be plotted e.g.
sqrt'(x).
To compute the derivative of an expression you must define the expression as a named function: E.g.
f(x)=x^3+x^2+1, followed by f'(x).
Multi plot
To plot multiple functions on the same 2d graph, simply enter them on the same line separated by ";".
E.g.
x;x^2;2
Binary, octal, hexadecimal
You can enter values in binary, octal or hexadecimal by prefixing them with 0b, 0o or 0x respectivelly, such as:
binary: 0b1010
octal: 0o17
hex: 0x100

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