3 arcsin 1/2+4 arccos(-1/2)-arctg(-√3)

Решение3 arcsin 1/2+4 arccos(-1/2)-arctg(-√3) = 3*(π/6) + 4*(2π/3) - 2π/3 == π/2 + 8π/3 - 2π/3 = π/2 + 2π = 5π/2