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A player sitting on the top of a tower of height 40m observes the angle of depression of a ball lying on the ground is `60^(@)`. The distance between the foot of the tower and ball is…………m.

A

20

B

`80 / sqrt 61`

C

`40 / sqrt 3`

D

`40 /sqrt 6`

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BEYOND PUBLICATION-APPLICATIONS OF TRIGNOMETRY-EXERCISE
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  2. The length of the string of a kitef flying at 100m above the ground wi...

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  4. If the ratio of height of a tower and the length of its shadow on the ...

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  5. If the angle of elevation of a tower from a distance of 100 m from its...

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  6. An object is placed above the observer's horizontal, we call the angle...

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  7. Angle of elevation of the top of a building from a point on the ground...

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  8. What change will be observed in the angle of elevation as we move away...

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  9. An objcet is placed below the observer's horizontal, then what is the ...

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  10. What change will be observed in the angle of elevation as we approach ...

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  11. In the figure given below, the imaginary line through the object and e...

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  13. If a pole height 6m casts a shadow 2sqrt(3)m long on the ground, then ...

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  14. In the figure given below, if AD = 7 sqrt 3 m, then BC = …………..m.

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  15. The length of the shadow of a tree is 7m high, when the sun's elevatio...

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  16. If two tangents inclined at an angle of 60^(@) are drawn to a circle o...

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  17. The angle formed by the line of sight with horizontal, when the point ...

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  18. cot^2 B-cosec^2 B=………….

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  19. (tan theta)/(sec theta)=…………….

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  20. A boy observed the top of an electrical pole to be at angle of elevati...

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