Question :-Find the torsion of

Strategy :-First convert into . Then find (unit tangent vector). Then find the (unit binormal vector). Then take its derivative and game is up.

Problems :-But....a biiiig BUT....I am stuck ....Till now I have done problems in which there were equations of circles and elipses etc and it was easier to convert them into parametric form and then conert into ...here I am atuck with these s....

Questions :-1. How do I write the parametric forms and convert them from to ?

2.How do I find the unit normal vector vector with which I have to cross the unit tangent vector ?

Please take your time answering cuz I am stuck really bad....Thanks a lot...