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JEE Main 2004 Mathematics question

MathematicsTrigonometric Ratio and IdentitiesJEE Main 2004

A person standing on the bank of a river observes that the angle of elevation of the top of a tree on the opposite bank of the river is and when he retires 40 meter away from the tree the angle of elevation becomes . The breadth of the river is

Answer: (1)

Solution

Let the breadth be and height : and $h = (x +

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Question ID VK-038469