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  1. An observer on a cliff top 57 m high observes a ship at sea. The angle of depression to the ship is 15°. The ship sails towards the cliff, and the angle of depression is then 25°. How far, to the nearest metre, did the ship sail between sightings?

 Apr 26, 2015

Best Answer 

 #3
avatar+129690 
+5

Oops.... I made a slight error

It should be

(57/tan15 - 57/tan25) =   about 90.49m

I'll give you a pic in a second......

 

 

  

 Apr 26, 2015
 #1
avatar+129690 
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 Apr 26, 2015
 #2
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  1. the answer is meant to be 91 m but i dont get how? can someone expain it to me please. thanks

 Apr 26, 2015
 #3
avatar+129690 
+5
Best Answer

Oops.... I made a slight error

It should be

(57/tan15 - 57/tan25) =   about 90.49m

I'll give you a pic in a second......

 

 

  

CPhill Apr 26, 2015

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