A vertical tower stands on a horizontal plane and is surmounted by a vertical flagstaff of height h. At a point on the p

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Q 3020578411.     A vertical tower stands on a horizontal plane and is surmounted by a vertical flagstaff of height h. At a point on the plane, the angle of elevation of the bottom of the flagstaff is ` \alpha` and that of the top of the flagstaff is ` \beta ` Then the
height of the tower is :
A

`\frac { h }{ \tan { \alpha } }`

B

`\frac { h\tan { \alpha } }{ \tan { \beta } -\tan { \alpha } }`

C

`\frac { \tan { \beta } }{ h }`

D

`\frac { \tan { \alpha } }{ \tan { \beta } -\tan { \alpha } }`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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