sinx>1/2
arcsin(1/2)=π/6 (π/6) +2πn<x < (π–(π/6)+2πn, n ∈ Z ((π/6) +2πn; (5π/6)+2πn), n ∈ Z О т в е т. ((π/6) +2πn; (5π/6)+2πn), n ∈ Z