(1)x=(t^2)^2+1 x=(y-1)^2+1x=y^2-2y+1+1y^2-2y-x+2=0(2)因为sin^2a+cos^2a=1(sina+cosa)^2-2sina*cos=1x^2-2y=1(3)11-5y-3x=0
(y-1)^2=xx^2=2y+111-5y-3x=0
