A circle is drawn with the centre O PA are PB are tangents to the circle . Prove that KN=AK+BN
Kindly refer the link for your query if it is same as your question seems to be incomplete.
https://www.meritnation.com/ask-answer/question/pa-and-pb-are-tangents-from-p-to-the-circle-with-center-o/circles/11510880
Regards
https://www.meritnation.com/ask-answer/question/pa-and-pb-are-tangents-from-p-to-the-circle-with-center-o/circles/11510880
Regards