Questions
A vertical pole stands at a point A on the boundary of a circular park of radius ‘a’ and subtends an angle at another point B on the boundary. If the chord AB subtends an angle at the center of the park, the height of the pole is
detailed solution
Correct option is A
Suppose that h be the height of the pole from triangle APB,tanβ=hAB⇒h=ABtanβ from triangle ABC,sinα2=AB2a⇒AB=2asinα2∴h=2asinα2tanβTalk to our academic expert!
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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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