Question 857613: Find the magnitude and direction of the vector V = <2,-4>
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Find the magnitude and direction of the vector V = <2,-4>
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magnitude = sqrt[2^2 + 4^2] = 2sqrt(5)
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Notice that (2,-4) is in QIV
direction = arctan(-4/2) = arctan(-2) = -63.43 = 296.57 degrees
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Cheers,
Stan H.
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