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

      MTH$ATAN_R4

      MTH$DATAN_R7

      MTH$GATAN_R7

      Each of the above JSB entry points accepts one of the floating-
      point types as input.