Since both components are negative, so the vector lies on the
3rd quadrant.
Calculate for angle using tanθ:
tanθ = y / x
θ = tan^-1 (-2 / -2)
θ = 45°
Since this is in 3rd quadrant, therefore when
reference with respect to east or 1st quadrant, the angle is:
θ = 180 + 45 = 225° from the east (counter clockwise)
θ = 90 + 45 = 135° from the east (clockwise)
