 In the special case and , the formula yields 

When both and are unit vectors, we obtain the usual relation
where is the angle between the vectors.A relationship between the Levi–Cevita symbols and the generalized Kronecker delta is

The formula_9 form of the Binet–Cauchy identity can be written as 

Expanding the last term,

where the second and fourth terms are the same and artificially added to complete the sums as follows