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

 h-tan

    OpenVMS usage:floating_point
    type:         H_floating
    access:       write only
    mechanism:    by reference

    Tangent of the angle specified by angle-in-degrees. The h-tan
    argument is the address of an H-floating number that is this
    tangent. MTH$HTAND writes the address of the tangent into h-tan.

 angle-in-degrees

    OpenVMS usage:floating_point
    type:         H_floating
    access:       read only
    mechanism:    by reference

    The input angle (in degrees). The angle-in-degrees argument is
    the address of a floating-point number that is this angle. For
    MTH$HTAND, angle-in-degrees specifies an H-floating number.