The expression for the parts of off-diagonal elements of electrical conductivity which are related with anomalous Hall and magneto-optics effects in pure ferromagnetic metals have been found using the methods of thermodynamic diagram technique. It was the electron-phonon scattering mechanism that has been taken as one that is responsible for frequency-dependent terms in the expression of imaginary parts of the off-diagonal elements mentioned above. The calculations have been done for the frequency interval that is not very close to the frequency corresponding to the interband transitions. In this particular case the character of a frequency dependence of the given part of electrical conductivity at low temperatures has been determined and the maximum of its imaginary part near the Debye frequency predicted.