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

 complex-cosine

    OpenVMS usage:complex_number
    type:         D_floating complex, G_floating complex
    access:       write only
    mechanism:    by reference
    Complex cosine of the complex-number. The complex cosine routines
    that have D-floating and G-floating complex input values write
    the address of the complex cosine into the complex-cosine
    argument. For MTH$CDCOS, the complex-cosine argument specifies
    a D-floating complex number. For MTH$CGCOS, the complex-cosine
    argument specifies a G-floating complex number.

 complex-number

    OpenVMS usage:complex_number
    type:         D_floating complex, G_floating complex
    access:       read only
    mechanism:    by reference
    A complex number (r,i) where r and i are floating-point numbers.
    The complex-number argument is the address of this complex
    number. For MTH$CDCOS, complex-number specifies a D-floating
    complex number. For MTH$CGCOS, complex-number specifies a G-
    floating complex number.