where \mathbf{i} is a unit vector (a vector of magnitude 1) in the x direction, \mathbf{j} is a unit vector in the y direction, and \mathbf{k} is a unit vector in the z directi...where \mathbf{i} is a unit vector (a vector of magnitude 1) in the x direction, \mathbf{j} is a unit vector in the y direction, and \mathbf{k} is a unit vector in the z direction. A_{x}, A_{y}, and A_{z} are called the x, y, and z components (respectively) of vector \mathbf{A}, and are the projections of the vector onto those axes.
