  Investigating the CKM matrix in different parametrization schemes, it is
noticed that those schemes can be divided into a few groups where the sine
values of the CP phase for each group are approximately equal. Using those
relations, several approximate equalities among the elements of CKM matrix are
established. Assuming them to be exact, there are infinite numbers of solutions
and by choosing special values for the free parameters in those solutions,
several textures presented in literature are obtained. The case can also be
generalized to the PMNS matrix for the lepton sector. In parallel, several
mixing textures are also derived by using presumed symmetries, amazingly, some
of their forms are the same as what we obtained, but not all. It hints
existence of a hidden symmetry which is broken in the practical world. The
nature makes its own selection on the underlying symmetry and the way to break
it, while we just guess what it is.
