PA is a tangent to a cirlce. PBC is secant touchig the circle at B and C. AD bisects angle BAC.
Show that: PAD is isosceles and 2
First of all we apologize for replying on your post so late.
However, the question posted by you lacks one information - The location of D. There is some ambiguity regarding the location of the point D, whether it lies on BC or it lies on the circle?
Please clarify and we'd get back to you with a correct and explanatory solution.