y=1-cost=3/2 ==>cost=-1/2.0<=t<=2Pi ==>t=5Pi/6,sint=sqrt(3)/2 or t=7Pi/6,sint=-sqrt(3)/2.==>x=5Pi/6-sqrt(3)/2 or x=7Pi/6+sqrt(3)/2.交点为(5Pi/6-sqrt(3)/2,3/2)或(7Pi/6+sqrt(3)/2,3/2).
