anonymous
  • anonymous
An airplane leaves an airport and flies due west 170 miles and then 240 miles in the direction S 69.50°W. How far is the plane from the airport (round to the nearest mile)? i dont get this at all
Mathematics
katieb
  • katieb
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carlyleukhardt
  • carlyleukhardt
v = -(170 + 240 sin(69.5)) i - 240 cos(69.5) j .... is the resulting vector || v || = √((170 + 240 sin(69.5))² + (240 cos(69.5))²) = 403.64892 mi Answer: 404 mi
anonymous
  • anonymous
i have to use the law of cosines

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