For example, dotting a vector A with any of the cartesian unit vectors gives the projection of A in that direction: In general, the projection of vector A in the...For example, dotting a vector A with any of the cartesian unit vectors gives the projection of A in that direction: In general, the projection of vector A in the direction of unit vector ˆu is A⋅ˆu. From Eq. (7.2.6), it follows that A⋅A=A2x+A2y+A2z=A2; so the magnitude of a vector A is given in terms of the dot product by
