VMS Help RTL Routines, MTH$, MTH$HATAN  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Given the tangent of an angle, the Arc Tangent in Radians (H-
    Floating Value) routine returns that angle (in radians) as an
    H-floating value.

    Format

      MTH$HATAN  h-radians ,tangent

  Additional Information (explode) :

• Corresponding JSB Entry Point
• Returns
• Arguments