From the top of a lighthouse, 100 m high, the angle of depression of a boat is ^ -1 ( 5 12 ). What is the distance between the boat and the lighthouse?

NDA 2017 Mathematics question

From the top of a lighthouse, 100 m high, the angle of depression of a boat is . What is the distance between the boat and the lighthouse?

Answer: (C)

If is the horizontal distance of the boat from the lighthouse, $θ

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Question ID VK-028612