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

 h-radians

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

    Angle (in radians) whose sine is specified by sine. The h-radians
    argument is the address of an H-floating number that is this
    angle. MTH$HASIN writes the address of the angle into h-radians.

 sine

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

    The sine of the angle whose value (in radians) is to be returned.
    The sine argument is the address of a floating-point number that
    is this sine. The absolute value of sine must be less than or
    equal to 1. For MTH$HASIN, sine specifies an H-floating number.