simple expression: 1+2
variable evaluation: pi
function evaluation: sin(0)
variable definition: a=3.5
function definition: f(x)=x^2-1
You can call the function by simple input f(xxx), for example, if you define a function `f(x,x1) = x + x1`, and if you input `f(2,3)`, the result will be `5`.
Logarithms and power
sqrt(x): square root; x^0.5
curt(x): cube root; x^(1/3)
log(x), ln(x): natural 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)
sinh(x), cosh(x), tanh(x)
asinh(x), acosh(x), atanh(x)
gcd(x,y): greatest common divisor
abs(x): absolute value
rnd(): random value from [0,1). rnd(max): random value from [0, max).
i or j is the complex base. Example:
+ - × ÷ basic arithmetic
√ square root
' first derivative
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. 3π+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.
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).
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 respectively, such as:
if you want to display the result in binary, octal, hexadecimal, click the menu `DEC` in the calculator.
The digits displayed on the graphs were too tiny to read easily. That's been fix. Thank you. Now to learn about all the extra stuff that's been added. Any instructions?
The digits displayed on the graphs are too tiny to read easily. And, since graphing is the main purpose of this app, that's a big problem.
The cursor line is gone on Android 6.0 which makes editing your equation very time consuming