10.1.2  Functions 

Functions are expressed as:
     function<expression>
The  parenthesis around the argument of the function may be omitted if the
argument is a number.  All functions may be  abbreviated.   The  available
functions are:
     1.  [ARC]SINE - [inverse] Sine of angle in degrees
     2.  [A]COSINE - [inverse] Cosine of angle in degrees
     3.  [A]TANGENT - [inverse] Tangent of angle in degrees
     4.  RADIANS - Converts degrees to radians
     5.  DEGREES - Converts radians to degrees
     6.  GAMMA - GAMMA function (GAMMA(n)=(n-1)!) (Cern Library)

     7.  LOGARITHM - Log to the base 10
     8.  EXPONENTIAL - Power of e (inverse LN)
     9.  LN - Logarithm to the base e
    10.  SQRT - Square root
    11.  RANDOM - Random number.  RAN(0) produces a random number.  RAN(n)
         sets the seed to n and starts a new random number sequence.
    12.  ABSOLUTE - Absolute value
    13.  INTEGER - Integer part of a number
    14.  FRACTION - Fractional part of a number
    15.  NINTEGER - Nearest integer to a number
    16.  ERF - Error function (Cern Library)
    17.  ERFC - Error function (Cern Library)
    18.  FREQ - Frequency function (Cern Library)