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anonymous
 one year ago
Given that the wingspan of an aeroplane is 30m, find the plane's altitude to the nearest metre if the wingspan subtends an angle of 14' when it is directly overhead.
anonymous
 one year ago
Given that the wingspan of an aeroplane is 30m, find the plane's altitude to the nearest metre if the wingspan subtends an angle of 14' when it is directly overhead.

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MrNood
 one year ago
Best ResponseYou've already chosen the best response.0dw:1436343667526:dw The above drawing will give you the answer  you can use the tan function to find h NOTE: it is a very minor approximation because the plane is 15m away from overhead in the drawing. However  you can be confident that the error will be so small as to be negligible in this case

MrNood
 one year ago
Best ResponseYou've already chosen the best response.0dw:1436343883202:dw The above will give the precise answer  use the tan function again But it will give essentially the same as the first drawing.
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