An airplane leaves an airport and flies due west 180 miles and then 160 miles in the direction S79.17˚W. How far is the plane fr
om the airport at this time (to the nearest mile)?
1 answer:
Using the cosine rule
x^2 = 180^2 + 160^2 - 2.160.180 cos 169.17
= 114574.09
x = sqrt 114574.09 = 338 miles to nearest mile
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