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A vertical tower stands on a horizontal ...

A vertical tower stands on a horizontal plane and is surmounted by a vertical flagstaff of height.`alpha` Ata point on the plane the angle of elevation of the bottom of the flagstaff is a and that of the top of the flagstaff is `beta` show that the height of the tower is:

A

`( h tan beta)/( tan beta - tan alpha)`

B

`(h tan alpha )/(tan beta- tan alpha )`

C

`(h)/( tan alpha - tan beta)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
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