question 5 - 27 views

• 
  #1 Jyoti Pakianathan on 24 Jan 13

   

  Two towers face each other separated by a distance d = 40 m. As seen from the top of the first tower, the angle of depression of the second tower's base is 60o and that of the top is 30o. What is the height (in meters) of the second tower?

   

  <div class="cArrow"> </div><div class="cContentInner">Two towers face each other separated by a distance d = 40 m. As seen from the top of the first tower, the angle of depression of the second tower's base is 60o and that of the top is 30o. What is the height (in meters) of the second tower?</div>

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• 
  #2 kwonteddy17 on 25 Jan 13

   

  tan(30) times 40 = 23.094
  
  tan(60) times 40 = 69.282
  
  69.282 - 23.094 = 46.188 h

   

  <div class="cArrow"> </div><div class="cContentInner">tan(30) times 40 = 23.094 <br /> <br /> tan(60) times 40 = 69.282 <br /> <br /> 69.282 - 23.094 = 46.188 h</div>

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• 
  #3 David Kim on 25 Jan 13

   

  tan(60) = x/40
  tan(60)x40 = x
  x = 69.282
  
  tan(30) = y/40
  tan(30)x40 = y
  y = 23.094
  
  Height of 2nd tower = 69.282 - 23.094
  =46.188

   

  <div class="cArrow"> </div><div class="cContentInner">tan(60) = x/40 <br /> tan(60)x40 = x <br /> x = 69.282 <br /> <br /> tan(30) = y/40 <br /> tan(30)x40 = y <br /> y = 23.094 <br /> <br /> Height of 2nd tower = 69.282 - 23.094 <br /> =46.188</div>

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• 
  #4 Haley Park on 25 Jan 13

   

  tan 60= x/40
  tan 60*40=x
  x= 69.282
  
  tan 30= y/40
  tan 30*40=y
  y=23.1
  
  69.282-23.1=46.188

   

  <div class="cArrow"> </div><div class="cContentInner">tan 60= x/40 <br /> tan 60*40=x <br /> x= 69.282 <br /> <br /> tan 30= y/40 <br /> tan 30*40=y <br /> y=23.1 <br /> <br /> 69.282-23.1=46.188</div>

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• 
  #5 backchanyel17 on 25 Jan 13

   

  tan(60)x40 - tan(30)x40= Height of the second tower
  =46.188

   

  <div class="cArrow"> </div><div class="cContentInner">tan(60)x40 - tan(30)x40= Height of the second tower <br /> =46.188</div>

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• 
  #6 Elaine Kim on 25 Jan 13

   

  tan 60 = x/40
  tan 60*40 = x
  x= 69.282
  
  tan 30 = x/40
  tan 30*40 = x
  y= 23.094
  
  69.282 - 23.094
  = 46.188 (Height)

   

  <div class="cArrow"> </div><div class="cContentInner">tan 60 = x/40 <br /> tan 60*40 = x <br /> x= 69.282 <br /> <br /> tan 30 = x/40 <br /> tan 30*40 = x <br /> y= 23.094 <br /> <br /> 69.282 - 23.094 <br /> = 46.188 (Height)</div>

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• 
  #7 Alex Kim on 25 Jan 13

   

  x = 69
  
  y = 23
  
  69-23 = 46

   

  <div class="cArrow"> </div><div class="cContentInner">x = 69 <br /> <br /> y = 23 <br /> <br /> 69-23 = 46</div>

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• 
  #8 Nam Hyun Kim on 25 Jan 13

   

  tan(30) * 40 = 23.094
  tan(60) * 40 = 69.282
  = 46.188

   

  <div class="cArrow"> </div><div class="cContentInner">tan(30) * 40 = 23.094 <br /> tan(60) * 40 = 69.282 <br /> = 46.188</div>

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• 
  #9 anonymous on 25 Jan 13

   

  Tan (60) = x/40
  Tan (60)x40 = x
  x = 69.282m
  
  Tan (30) = y/40
  Tan (30) x 40 = y
  y = 23.094
  
  Answer:
  =46.188meters

   

  <div class="cArrow"> </div><div class="cContentInner">Tan (60) = x/40 <br /> Tan (60)x40 = x <br /> x = 69.282m <br /> <br /> Tan (30) = y/40 <br /> Tan (30) x 40 = y <br /> y = 23.094 <br /> <br /> Answer: <br /> =46.188meters</div>

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• 
  #10 Sally Rho on 25 Jan 13

   

  tan60=x/40
  y=tan60X40
  x=69.282
  
  tan30=x/40
  y=tan30X40
  y=23.094
  
  69.282-23.094
  =46.188

   

  <div class="cArrow"> </div><div class="cContentInner">tan60=x/40 <br /> y=tan60X40 <br /> x=69.282 <br /> <br /> tan30=x/40 <br /> y=tan30X40 <br /> y=23.094 <br /> <br /> 69.282-23.094 <br /> =46.188</div>

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• 
  #11 choandy17 on 25 Jan 13

   

  Tan(30) = y/40
  y= 23.094
  
  Tan(60) = x/30
  x=69.282
  
  x-y=
  69.282 - 23.094 = 46.188

   

  <div class="cArrow"> </div><div class="cContentInner">Tan(30) = y/40 <br /> y= 23.094 <br /> <br /> Tan(60) = x/30 <br /> x=69.282 <br /> <br /> x-y= <br /> 69.282 - 23.094 = 46.188</div>

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• 
  #13 trey noh on 25 Jan 13

   

  46.188

   

  <div class="cArrow"> </div><div class="cContentInner">46.188</div>

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• 
  #14 Janice Min on 25 Jan 13

   

  tan60=x/40
  tan60X40=x
  x=69.282
  
  Tan30=y/40
  tan30X40=y
  y=23.094
  
  69.282-23.094=46.188

   

  <div class="cArrow"> </div><div class="cContentInner">tan60=x/40 <br /> tan60X40=x <br /> x=69.282 <br /> <br /> Tan30=y/40 <br /> tan30X40=y <br /> y=23.094 <br /> <br /> 69.282-23.094=46.188</div>

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