VMS Help RTL Routines, MTH$, MTH$HATAND2  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Given sine and cosine, the Arc Tangent in Degrees (H-Floating
    Value) with Two Arguments routine returns the angle (in degrees)
    whose tangent is given by the quotient of sine and cosine
    (sine/cosine).

    Format

      MTH$HATAND2  h-degrees ,sine ,cosine

1 - Returns

    None.

2 - Arguments

 h-degrees

    OpenVMS usage:floating_point
    type:         H_floating
    access:       write only
    mechanism:    by reference
    Angle (in degrees) whose tangent is specified by (sine/cosine).
    The h-degrees argument is the address of an H-floating number
    that is this angle. MTH$HATAND2 writes the address of the angle
    into h-degrees.

 sine

    OpenVMS usage:floating_point
    type:         H_floating
    access:       read only
    mechanism:    by reference
    Dividend. The sine argument is the address of a floating-point
    number that is this dividend. For MTH$HATAND2, sine specifies an
    H-floating number.

 cosine

    OpenVMS usage:floating_point
    type:         H_floating
    access:       read only
    mechanism:    by reference
    Divisor. The cosine argument is the address of a floating-point
    number that is this divisor. For MTH$HATAND2, cosine specifies an
    H-floating number.