−6cos(x)+3√3=0
−6cos(x)=-3√3
сos(x)=√3/2
x=pi/6
x=11pi/6
sin(x3+π3)=−1
3x+3pi=3Pi/2
x=-pi/2+2kpi/3
x=pi/6+2kpi/3
2sin2(x)−9cos(x)=0
2*2sinxcosx-9cosx =0
cosx*4sinx-9=0
cosx=0
x=pi/2+kpi
6sin2(x)−7sin(x)cos(x)+7cos2(x)=0