A sailboat race course consists of four legs, defi ned by
Chapter , Problem 53(choose chapter or problem)
A sailboat race course consists of four legs, defi ned by the displacement vectors A B , B B , C B , and D B , as the drawing indicates. The magnitudes of the fi rst three vectors are A 5 3.20 km, B 5 5.10 km, and C 5 4.80 km. The fi nish line of the course coincides with the starting line. Using the data in the drawing, fi nd the distance of the fourth leg and the angle u.
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