Let line PA and line PC be tangents from P to a circle. Let B and D be points on the circle such that B, D, and P are collinear.

Let line PA and line PC be tangents from P to a circle. Let B and D be points on the circle such that B, D, and P are collinear. Prove that AB * CD = BC * DA.

Thanks, also if someone could take a look at this problem that would be greatly appreciated!

https://web2.0calc.com/questions/quick-one

:)