Mathematics for IGCSE & O level - Vectors (Section 4 - No. 21)
If vector a = [x, y], what represents the direction of the vector a?
√x^2 + y^2
y/x
arctan(y/x)
x^2 + y^2
הֶסבֵּר
The direction is given by the angle, which can be found using the arctangent.