Sin^2x-0,5sin2x=0 Reshite
1-сos2x-0.5*2sinxcosx=0 1-cos2x-sinxcosx=0 cosx(1-cosx-sinx)=0 cosx=0 -cosx-sinx=0 | : cosx x=pi/2+pi n -tgx=0 tgx= -pi+pi n