Ответ: Делим всё на cos 2xtg 2x = √32x = Π/3+Π*kx = Π/6+Π*k/2В промежуток [-Π/2; 2Π] попадают корниx1=Π/6-Π/2=-Π/3; x2=Π/6; x3=Π/6+Π/2=2Π/3; x4=Π/6+Π=7Π/6; x5=Π/6+3Π/2=5Π/3