                                %Standard Functions%

        All standard functions consist of only one argument.  If the argument
   is a real number then the standard function is evaluated.  They are :

   ArcHypCos...........inverse hyperbolic cosine         %Example%
   ArcHypSin...........inverse hyperbolic sine           þE : Sin(x) = x
   ArcHypTan...........inverse hyperbolic tangent
   HypCos..............hyperbolic cosine
   HypSin..............hyperbolic sine
   HypTan..............hyperbolic tangent
   ArcCos..............inverse cosine
   ArcSin..............inverse sine                 
   ArcTan..............inverse tangent
   Cos.................cosine
   Sin.................sine
   Tan.................tangent
   Exp.................natural exponential
   Ln..................natural logarithm
   Log.................common logarithm
