/sys$common/syshlp/helplib.hlb RTL Routines, MTH$, MTH$HATAN2  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Given sine and cosine, the Arc Tangent in Radians (H-Floating
    Value) with Two Arguments routine returns the angle (in radians)
    as an H-floating value whose tangent is given by the quotient of
    sine and cosine (sine/cosine).

    Format

      MTH$HATAN2  h-radians ,sine ,cosine

  Additional Information (explode) :

• Returns
• Arguments