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Given u = 20 (cos 30 , sin 30 ), what are the magnitude and direction of -3u? O-60; -90 O-60; 30 O 60; 90

Given u = 20 (cos 30 , sin 30 ), what are the magnitude and direction of -3u? O-60; -90 O-60; 30 O 60; 90 60; 210

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