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  3. find the direction angle of the vector u = -7i+4j.

Find the direction angle of the vector u = -7i+4j. That is, find the angle...

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Find the direction angle of the vector u = -7i+4j. That is, find the angle between 0 and 360 that u makes with the positive x-axis (measured counterclockwise), when u is in standard position.

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