We shall study the special case where the magnitude of the precession component |Ωz| of the angular velocity is much less than the magnitude of the spin component \(\left|\omega...We shall study the special case where the magnitude of the precession component |Ωz| of the angular velocity is much less than the magnitude of the spin component |ωs| of the spin angular velocity, |Ωz|<<∣ωs, so that the magnitude of the angular velocity |→ω|≃|ωs| and Ωz and ωs nearly constant.