The behaviour of a particle with a spin 1/2 and a dipole magnetic moment in a time-varying magnetic field in the form (h0cn(ωt, k), h0sn(ωt, k),H0dn(ωt, k)), where ω is the driving field frequency, t is the time, h0 and H0 are the field amplitudes, cn, sn, dn are Jacobi elliptic functions, k is the modulus of the elliptic functions has been considered. The variation parameter k from zero to 1 g...