question 7 - 29 views

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  #1 Jyoti Pakianathan on 24 Jan 13

   

  The angles of elevation of the top of a tower from the top and bottom of a 60 m high building are 30o and 60o. What is the height of the tower?

   

  <div class="cArrow"> </div><div class="cContentInner">The angles of elevation of the top of a tower from the top and bottom of a 60 m high building are 30o and 60o. What is the height of the tower?</div>

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• 
  #2 anonymous on 25 Jan 13

   

  Cos (60) = x/60
  x = Cos (60) x 60
  x = 30
  
  Tan (60) = a/60
  Tan (60) x 60 = a
  a = 104
  
  Tan (30) = y/104
  Tan (30) x 104 = y
  y = 60
  
  x= 30, y= 60
  30 + 60=90
  
  answer: 90meters

   

  <div class="cArrow"> </div><div class="cContentInner">Cos (60) = x/60 <br /> x = Cos (60) x 60 <br /> x = 30 <br /> <br /> Tan (60) = a/60 <br /> Tan (60) x 60 = a <br /> a = 104 <br /> <br /> Tan (30) = y/104 <br /> Tan (30) x 104 = y <br /> y = 60 <br /> <br /> x= 30, y= 60 <br /> 30 + 60=90 <br /> <br /> answer: 90meters</div>

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• 
  #4 Jyoti Pakianathan on 26 Jan 13

   

  Good job Eugene and Harshit. where are the other answers Block I

   

  <div class="cArrow"> </div><div class="cContentInner">Good job Eugene and Harshit. where are the other answers Block I</div>

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