Sinx/4 -√3Cos3x/8 - Sinx/2 = 0
-2Sinx/8 Cos3x/8 -√3Cos3x/8 = 0
2Sinx/8 Cos3x/8 +√3Cos3x/8 = 0
Cos3x/8(2Sinx/8 +√3) = 0
Cos3x/8 = 0 или 2Sinx/8 +√3 = 0
3x/8 = π/2 + πk , k ∈Z Sinx/8 = -√3/2
x = 4π/3 +8πk/3 , k ∈Z x/8 = (-1)^(n+1) π/3 + nπ, n ∈Z
x = (-1)^(n+1)8π/3 + 8nπ, n ∈Z