Boat in the lake
A boatman walks along the ship's deck at a constant speed of 5 km/h in a direction that forms an angle of 60° with the direction of the ship's speed. The boat moves with respect to the lake's calm surface at a constant speed of 10 km/h. Determine graphically the magnitude of the speed with which the boatman moves relative to the shores of the lake.
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Cosine rule uses trigonometric SAS triangle calculator.
See also our trigonometric triangle calculator.
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geometryarithmeticplanimetryUnits of physical quantitiesthemes, topicsGrade of the word problem
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