A circle C C\,C with centre (2,1)(2, 1)(2,1) passes through the point (−1,3)(-1, 3)(−1,3). A line L L\,L passes through the points (1,−4)(1, -4)(1,−4) and (10,2)(10, 2)(10,2).
Show that L L\,L is a tangent to CCC.
