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The angle of elevation of the top of a b...

The angle of elevation of the top of a building from the foot of a tower is `30^@` and the angle of elevation of the top of a tower from the foot of the building is `60^@`. If the tower is 50 m high, then find the height of the building.

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AGRAWAL PUBLICATION-INTRODUCTION TO TRIGNOMETRY AND ITS APPLICATIONS-EXAMPLE
  1. The angle of elevation of the top of a tower from a certain point is 3...

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  2. A straight highway leads to the foot of a tower. A man standing at the...

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  3. The angle of elevation of the top of a building from the foot of a tow...

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  4. If 1 + sin^2 theta = 3 sin theta cos theta, then prove that tan theta ...

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  5. From a point on the ground the angles of elevation of the bottom and t...

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  6. A vertical tower stands on a horizontal plane and is surmounted by a v...

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  7. From a point on the ground, the angles of elevation of the bottom and ...

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  8. A boy standing on a horizontal plane find that angle of elevation of a...

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  9. If sin theta + cos theta = p and sec theta + cosec theta = q, then pro...

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  10. The angle of elevation of an aeroplane from a point A on the ground is...

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  11. Prove that: [(1 + cot theta + tan theta)(sin theta - cos theta)]/(sec^...

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  12. If sec theta + tan theta = m, show that (m^2 - 1)/(m^2 + 1)= sin theta...

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  13. A moving boat is observed from the top of a 150 m high cliff moving aw...

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  14. A ladder rests against a vertical wall at an inclination alpha to the ...

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  15. There are two poles, one each on either bank of a river just opposite ...

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  16. Amit, standing on a horizontal plane, finds a bird flying at a distanc...

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  17. Prove that: (tan theta)/(1 - cot theta) + (cot theta)/(1 - tan theta) ...

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  18. The lower window of a house is at a height of 2 m above the ground and...

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  19. Prove that: (sin theta)/(cot theta + cosec theta) = 2 + (sin theta)/(c...

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  20. Prove that (sin A - cos A + 1)/(sin A + cos A - 1) = 1 /(sec A - tan A...

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