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A boy standing at a distance of 48 meter...

A boy standing at a distance of 48 meters from a building observes the top of the building and makes an angle of elevation of `30^@` . Find the height of the building.

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The correct Answer is:
The height of the building is `16sqrt(3)` m .
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An observer at a distance of 10 m from a tree looks at the top of the tree , the angle of elevation is 60^(@) . What is the height of the tree ? ( sqrt(3) = 1 .73 )

A 1.5 m tall boy is standing at some distance from a 30 m tall building. The angle of elevation from his syes to the top of the building increases from his eyes to the top of the building increases from 30^@ to 60^@ as he walks towards the building. Find the distance he walked towards the building.

Two buildings are in front of each other on a road of width 15 meters. From the top of the first building, having a height of 12 meters, the angle of elevation of the top of the second building is 30^@ . What is the height of the second building?

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TARGET PUBLICATION-TRIGONOMETRY -Problem set - 6
  1. (3) 1 + tan^2 theta =?

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  2. What we see at a higher level from the horizontal line, angle formed i...

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  3. If sin theta = 11/61 find the values of cos theta using trigonometric...

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  4. (1) If tan theta=2, find the values of other trigonometric ratios usin...

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  5. If sec theta = 13/12, find values of other trigonometric ratios.

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  6. Prove that : sec theta (1 - sin theta ) (sec theta + tan theta ) = 1

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  7. Prove : (sec theta+tan theta)(1-sin theta)=cos theta.

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  8. Prove that : sec^(2)theta+"cosec"^(2)theta=sec^(2)theta*"cosec" ^(2)t...

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  9. Prove the following : cot^2 theta - tan^2 theta = cosec^2 theta -sec^2...

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  10. Prove that : tan^(4)theta + tan^(2)theta = sec^(4)theta - sec^(2) th...

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  11. Prove 1/(1+sintheta)+1/(1-sintheta) = 2 sec^2 theta

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  12. Prove the following : sec^6 x - tan^6 x = 1 + 3 sec^2 x times tan^2 x

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  13. Prove the following : (tan theta) / (sec theta + 1) = (sec theta - 1) ...

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  14. Prove the following: (tan^3 theta - 1)/(tan theta - 1) = sec^2 theta ...

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  15. Prove that (sin theta - cos theta +1)/(sin theta + cos theta -1) = (...

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  16. A boy standing at a distance of 48 meters from a building observes the...

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  17. From the top of a lighthouse, an observer looks at a ship and finds th...

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  18. Two buildings are in front of each other on a road of width 15 meters....

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  19. A ladder on the platform of a firebrigade van can be elevated at an an...

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  20. While landing at an airport, a pilot made an angle of derpession of 20...

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