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Prove that: (sinA - 2sin^(3)A)/(2 cos^(3...

Prove that: `(sinA - 2sin^(3)A)/(2 cos^(3)A - cosA) = tan A`

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EDUCART PUBLICATION-INTRODUCTION TO TRIGNOMETRY AND ITS APPLICATIONS -LONG ANSWER TYPE QUESTIONS
  1. A ladder rests against a vertical wall at inclination alpha to the hor...

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  2. There are two temples, one on each bank of a river, just opposite t...

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  3. A boy standing on a horizontal plane finds a bird flying at a distance...

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  4. prove that: (tan theta)/(1-cot theta)+(cot theta)/(1-tan theta)=1+sec ...

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

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  6. Prove that: (sin theta)/(cot theta + "cosec"theta) = 2 + (sin theta)/(...

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

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  8. A man in a boat rowing away from a light house 100 m high takes 2 minu...

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  9. Two poles of equal heights are standing opposite each other on either...

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  10. The shadow of a flagstaff is three times as long as the shadow of the...

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  11. Prove that: (sinA - 2sin^(3)A)/(2 cos^(3)A - cosA) = tan A

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

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  13. The angle of elevation of a cloud from a point 10 meters above the sur...

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  14. From a point A on the ground , the angles of elevation of the top of a...

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  15. A 1.5m tall boy is standing at some distance from a 30m tall buildi...

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  16. From the top of a 120 m hight tower a man observes two cars on the opp...

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  17. A vertical tower stands on a horizontal plane and is surmounted by a f...

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  18. From a point 200 m above a lake , the angle of elevation of a cloud is...

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  19. A bird is sitting on the top of a 80 m high tree. From a point on the ...

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  20. As observed from the top of a 100 m high light house from the sea leve...

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