3.1.1 Internal functions and operators


The following functions and operators are by default known to Graph2D:

  sin(x), arcsin(x), sinh(x),
  cos(x), arccos(x), cosh(x),
  tan(x), arctan(x), tanh(x),
  arctanh(x)   - The well-known trigonometrical functions
  abs(x)       - The absolute value of the argument, also known as |x|
  int(x)       - The integer value of the argument
  ln(x)        - natural logarithm (to the base 2)
  sqrt(x)      - The square root x^(1/2)
  sgn(x)       - returns 1, 0, -1 in dependance of x>0, x=0, x<0
  fak(x)       - known as x!. e.g. fak(4)=4*3*2*1=24
                 (only defined for positive integer values)
  if(a, b)     - returns b if a is TRUE (=1) otherwise 0


  + , -        
  * , /
  ^            - I think you know that, don't you?
  = , > , <,
  >=, <=, <>   - Compare the two operands
                 e.g. a>b=1 if a>b otherwise a>b=0
  AND, OR, NOT - Boolean operators. Only use them for values like
                 1 (TRUE) and 0 (FALSE). Do not expect a bit-wise
                 work of those operators!