√3 ctg(π/3 - x) = -3
- √3 ctg(x - π/3 ) = -3
ctg(x - π/3 )= 3 / √3
ctg(x - π/3) = √3
x - π/3 = arcсtg(√3) + πn, n∈Z
x - π/3 = π/6 + πn, n∈Z
x = π/3 + π/6 + πn, n∈Z
x = π/2 + πn, n∈Z
