Applications of trigonometry
The angle of elevation of top of an unfinished tower at a point distance 120m from its base is 450. How much height must the tower be raise so that angle of elevation of top at the same point to be 600.
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A person standing on the bank of 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 meters away from the tree the angle of elevation becomes . Then the breadth of the river is
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