直线过点P（1,1）,倾斜角为π/6,∴直线方程为y-1=tan(π/6)(x-1)(y-1)/sin(π/6) =(x-1)/cosπ/6令t=(y-1)/sin(π/6) =(x-1)/cosπ/6则x=1+t×cosπ/6,y=1+t×sin(π/6)∴参数方程为x=1+(√3t)/2,y=1+t/2,（t为参数...