Найти область определения y = sqrt(cosx-sqrt(3)/2)
cosx-sqrt(3)/2 ≥ 0 cosx ≥ sqrt(3)/2 (-π/6) +2πn ≤ x ≤ (π/6) +2πn, n ∈ [b]Z[/b] О т в е т. [(-π/6) +2πn ; (π/6) +2πn], n ∈ [b]Z[/b]