Can anibody help me to find point_C on circle where the distance { point_1-point_C-point_2 } is the shortest . Point_1 and point_2 are outside of circle.

( In othe words , point_C should be the image of point_1 on circle from the point_2 view , and oposite point_C should be the image of point_2 on circle from the point_1 view )

Thanks

thanks