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The angle of elevation of the top of a H...

The angle of elevation of the top of a H m. high tower from two points A and B on the horizontal plane are `60^(@)` and `30^(@)` respectively. If the distance of A from the foot of the tower is ä m. then the distance of B from the foot of the tower will be ……….m

A

`(H^(2))/(a)`

B

`(2H^(2))/(a)`

C

`(sqrt(H))/(a)`

D

None of these

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