Two vectors u and v are orthogonal if $ u*v=0 $, where u*v denotes the inner product of the two vectors. They are orthonormal if they both are also unit vectors ($ u*u=1 $ and $ v*v=1 $)
Note that the zero vector is orthogonal to every vector.
Two vectors u and v are orthogonal if $ u*v=0 $, where u*v denotes the inner product of the two vectors. They are orthonormal if they both are also unit vectors ($ u*u=1 $ and $ v*v=1 $)
Note that the zero vector is orthogonal to every vector.
