Public Function RC( _ ByVal vX As Variant _ , ByVal vY As Variant _ ) As Variant
RC(1, 1) = 1 RC(1, 2) = 0.785398163397448 RC(2, 1) = 0.881373587019543 RC(2, 2) = 0.707106781186547See also:
RD Function RF Function RJ Function DRC FunctionvX: Function returns Null if vX is Null or cannot be fixed up to a Double precision floating point number.
The routine calculates an approximation result to RC(X,Y) = integral from zero to infinity of
-1/2 -1 (1/2)(t+X) (t+Y) dt,where X is nonnegative and Y is positive. The duplication theorem is iterated until the variables are nearly equal, and the function is then expanded in Taylor series to fifth order. Logarithmic, inverse circular, and inverse hyperbolic functions can be expressed in terms of RC.
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