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A radar station located at point A is tracking ships at points B and C.  How far apart are the two ships, to the nearest tenth of a kilometre?

 

 Mar 20, 2021
 #1
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Using the Law of Cosines

 

BC^2  =  4.9^2 + 6.8^2   - 2 ( 4.9 * 6.8)cos (70°)

 

BC^2  = 47.46

 

BC  = sqrt ( 47.46)  ≈  6.9 km

 

 

cool cool cool

 Mar 20, 2021

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