Commutators of the Unilateral shift and adjoint for reproducing kernel Hilbert spaces on the disk

We generalise the result of Berger and Shaw [2] the trace formula for Hardy Hilbert space to a larger class of rotation invariant Hilbert function spaces on the unit disk.We also demonstrate many meaningful examples of these Hilbert spaces by computing the inner products.We also extend to a wider class than the unilateral shift, that is, weighted shifts under certain restrictions.