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

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

    Format

      MTH$TAN  angle-in-radians

      MTH$DTAN  angle-in-radians

      MTH$GTAN  angle-in-radians

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

1 - Corresponding JSB Entry Points

      MTH$TAN_R4

      MTH$DTAN_R7

      MTH$GTAN_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

    The tangent of the angle specified by angle-in-radians. MTH$TAN
    returns an F-floating number. MTH$DTAN returns a D-floating
    number. MTH$GTAN returns a G-floating number.

3 - Argument

 angle-in-radians

    OpenVMS usage:floating_point
    type:         F_floating, D_floating, G_floating
    access:       read only
    mechanism:    by reference

    The input angle (in radians). The angle-in-radians argument is
    the address of a floating-point number that is this angle. For
    MTH$TAN, angle-in-radians specifies an F-floating number. For
    MTH$DTAN, angle-in-radians specifies a D-floating number. For
    MTH$GTAN, angle-in-radians specifies a G-floating number.