Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2014)

done JEE Main Paper (Held On 11 April 2014) Total Questions - 1

• question_answer1) The angle of elevation of the top of a vertical tower from a point P on the horizontal ground was observed to be \[\alpha .\] After moving a distance 2 metres from P towards the foot of the tower, the angle of elevation changes to \[\beta .\] Then the height (in metres) of the tower is:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[\frac{2\sin \alpha \sin \beta }{\sin \left( \beta -\alpha  \right)}\]           
  done clear
  B)
  \[\frac{\sin \alpha \sin \beta }{\cos \left( \beta -\alpha  \right)}\]
  done clear
  C)
  \[\frac{2\sin \left( \beta -\alpha  \right)}{\sin \alpha \sin \beta }\]                           
  done clear
  D)
  \[\frac{\cos \left( \beta -\alpha  \right)}{\sin \alpha \sin \beta }\]
  done clear
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