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If Jane walks North for 3 miles, turns 45 degrees to the right, and then walks another 4 miles, how many miles will Jane be from her starting point? Give your answer as a decimal rounded to the nearest hundredth. 

 Oct 2, 2021
 #1
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By the cosine law, Jane will be 5.8 units from her starting point.

 Oct 2, 2021
 #2
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wrong

Guest Oct 2, 2021
 #4
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....make sure you use cos 135   if using cos law for this problem !

ElectricPavlov  Oct 2, 2021
 #3
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(3 + 4 sin 45)^2   +  (4 cos 45)^2   = d^2     d= 6.478 miles   (6.48 miles   rounded)

 Oct 2, 2021
edited by ElectricPavlov  Oct 2, 2021

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