, ​

Объяснение:

sin((x/4)-(π/6)=-√3/2

{(x/4)-(π/6))=-π/3+2πn              {(x/4)-=-π/6+2πn  |×4         {x₁=-2π/3+8πn.

{sin((x/4)-(π/6))=4π/3+2πn         {x/4=9π/6+2πn  |×4        {x₂=6π+8πn.