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

    The Tangent of Angle Expressed in Degrees routine returns the
    tangent of a given angle (in degrees).

    Format

      MTH$TAND  angle-in-degrees

      MTH$DTAND  angle-in-degrees

      MTH$GTAND  angle-in-degrees

      Each of the above formats accepts one of the floating-point
      types as input.

1 - Corresponding JSB Entry Points

      MTH$TAND_R4

      MTH$DTAND_R7

      MTH$GTAND_R7

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

2 - Returns

    OpenVMS usage:floating_point
    type:         F_floating, D_floating, G_floating
    access:       write only
    mechanism:    by value

    Tangent of the angle specified by angle-in-degrees. MTH$TAND
    returns an F-floating number. MTH$DTAND returns a D-floating
    number. MTH$GTAND returns a G-floating number.

3 - Argument

 angle-in-degrees

    OpenVMS usage:floating_point
    type:         F_floating, D_floating, G_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 which is this angle. For
    MTH$TAND, angle-in-degrees specifies an F-floating number. For
    MTH$DTAND, angle-in-degrees specifies a D-floating number. For
    MTH$GTAND, angle-in-degrees specifies a G-floating number.