Sin (π/3 - x/4) = √3 /2 (π/3 - x/4) = π/3 +2πn и (π/3 - x/4) = 2π/3 + 2πn первое решение x/4 = 0 x=0 второе x/4 = π/3 - 2π/3 = - π/3 x= - 4π/3 с периодом 2пи