Помогитеееееее номер 12, 14, 16

12
сos(x/2-π/6)=1/2
x/2-π/6=-π/3+2πn,n∈z U x/2-π/6=π/3+2πk,k∈z
x/2=-π/6+2πn,n∈z u x/2=π/2+2πk,k∈z
x=-π/3+4πn,n∈z u x=π+4πk,k∈z
xнаим=-π/3
14
sin(2x-π/3)=-1/2
2x-π/3=7π/6+2πn,n∈z U 2x-π/3=11π/6+2πk,k∈z
2x=3π/2+2πn,n∈z U 2x=13π/6+2πk,k∈z
x=3π/4+πn,n∈z U x=13π/12+πk,k∈z
xнаим=3π/4
16
x+π/12=π+2πn,n∈z
x=11π/12+2πn,n∈z
xнаим=11π/12