An airplane travels 321 km on a straight course at an angle of 27.5 east of
north. It then changes its course by moving 121 km north before reaching its
destination. Determine the resultant displacement of the airplane.
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As we see, the resultant displacement can be found by simple math:
D
y
=100+209 cos40°=260 km.
D
x
=209 sin40°=134 km.
D=292 km.
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