The angles of elevation of the top of a tower from two points distant ‘a’ and ‘b’ from the base and in the same straight line with it are complementary. The height of the tower is
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a
ab
b
ab
c
ab
d
ab
answer is B.
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Detailed Solution
We have tanα=ha,tan90−α=hb⇒cotα=hb⇒ah=hb⇒h2=ab⇒h=ab