If |z-25i| 15 and | . (z)- . (z)| is m ^ -1 pq, then find mp-q. (Given that G.C.D. (p,q)=1)

JEE Main Mathematics question

If and is , then find . (Given that G.C.D. )

Answer: 1

The disc has centre and radius , so the tangents from the origin make an angle

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Question ID VK-014234