What's the definition of "vector components"? I mean that when I resolve a vector into two components, my teacher taught us to find its x-component which is on x-axis and y-component on y-axis, so if it be the case, then this vector must not be on either x-axis or y-axis but between. So is that the components of a vector must be on x-axis and y-axis? Or it may depends, as long as the two components are perpendicular to each other, and the vector is between them, it's okay? Hope you can tell me, thanks.