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From an aeroplane vertically over a stra...

From an aeroplane vertically over a straight horizontal road, the angles of depression of two consecutive milestones on opposite sides of the aeroplane are observed to be `alpha` and `beta`. The height of the aeroplane above the road is

A

`(tanalpha+tanbeta)/(tanalphatanbeta)`

B

`(tanalpha tanbeta)/(tanalpha+tanbeta)`

C

`(cotalphacotbeta)/(cotalpha+cotbeta)`

D

None

Text Solution

Verified by Experts

The correct Answer is:
B
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