Question: plotting discontinuities in parametric form

In plotting a function with discontinuities such as y = tan(x), I know that using the plot options "discont=true, scaling=constrained" allows for normal plotting with vertical asymptotes.  But how do I do with with plotting a curve given by parametric equations?  My curve has a skewed symptote and I can't get my plot to show this.  It just "blows up" and the scaling goes to infinity.  

 

Thank you, anyone, for your help.

 

        David

Please Wait...