设P点横坐标为(X,Y)COS(-11π6/)=COSπ/6=√3/2SIN(-11π/6)=SINπ/6=1/2X/|OP|=COSθ=√3/2X=3Y/|OP|=SINθ=1/2Y=√3所以P坐标为(3,√3)