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A and B are two points 30 m apart in a l...

A and B are two points 30 m apart in a line on thehorizontal plane through the foot of a tower lyingon opposite sides of the tower. If the distance of thetop of the tower from A and B are 20 m and 15 mrespectively, the angle of elevation of the top ofthe tower at A is-

A

`cos^(-1) (43//48)`

B

`sin^(-1) (43//48)`

C

`cos^(-1) (29//36)`

D

`sin^(-1) (29//36)`

Text Solution

Verified by Experts

The correct Answer is:
A
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Knowledge Check

  • Two points A and B are on the ground and on opposite sides of a tower. A is closer to the foot of tower by 42 m than B. If the angles of elevation ofthe top of the tower, as observed from A and B are 60∘ and 45∘, respectively. then the height of the tower is closest to:

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