L c o s th 1 2 s i n th 2. A 2 b 2 c 2. Substitute x 1 y 1 h k x 2 y 2 x y and d r.
Using the Distance Formula the shortest distance between the point and the circle is x 1 2 y 1 2 r.
L x 1 2 y 0 2 x 1 2 y 2. We also know that for all points on the unit circle x c o s th and y s i n th. D sqrt x_2 - x_12 y_2 - y_12 d x2. Displaystyle Delta sigma 2arcsin frac C 2.