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A tower leans towards North. At two poin...

A tower leans towards North. At two points due south of it and at distances a and b metres respectively from its foot, the angles of elevation of the top of the tower are found to be a and B. If is the angle of inclination of the tower to the horizontal, then cot O is equal to :

A

`( b cot alpha + a cot beta)/( b +a)`

B

`(b cot alpha- a cot beta)/( b + a)`

C

`(b cot alpha -a cot beta)/(b-a)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
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