is involved.The vector components change if we use a different reference axis. This is because the components of a vector along an axis is just its projection on that axis. Therefore, if we choose a new axis that is not parallel to the other one, then that will change the component. Furthermore, the magnitude of the resultant does not change when we choose a different reference axis due to magnitude being a scalar quantity. When we choose a different axis that is not parallel to the original one then the direction of the vector can also be different. This simply follows from the fact that the component of the vector changes.