Question: Vector u is given, find the angle [0, 2) that vector u makes with the positive direction of the x-axis, in a counter-clockwise

Vector u is given, find the angle θ ∈ [0, 2π) that vector u makes with the positive direction of the x-axis, in a counter-clockwise direction.

( mathbf{u}=-sqrt{3} mathbf{i}-mathbf{j} ) 

36. u = -3i - j

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