NAME
    IEEEDPTan -- compute the tangent of a floating point number

SYNOPSIS
      x   = IEEEDPTan(  y  );
    d0/d1             d0/d1

    double  x,y;

FUNCTION
    Compute tangent of y in IEEE double precision

INPUTS
    y - IEEE double precision floating point value

RESULT
    x - IEEE double precision floating point value

BUGS

SEE ALSO
    IEEEDPAtan(), IEEEDPSin(), IEEEDPCos()