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Q.61. From the top of a 10 m high building, the angle of depression of the foot of a tower is 30 ° and the angle of elevation of top of the tower from the foot of the building is 60 ° . Find the distance between the tops of the building and the tower.
[Use 7 = 2.64]


Here BC= AE and in right triangle ABC, tan30 = 10BCBC = 103so AE = 103Now in right triangle DAEcos60 = AEADAD =  10312= 203 m 

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