A vector with a unit magnitude is a unit vector. The physical quantities which are described by its magnitude and direction are vector quantities.
Formula for Magnitude of vector A in 2D plane =
Formula for Magnitude of vector A in 3D plane = 
A vector with a unit magnitude is a unit vector. The physical quantities which are described by its magnitude and direction are vector quantities.
Formula for Magnitude of vector A in 2D plane =
Formula for Magnitude of vector A in 3D plane =
