1
cosx>-√3/2
x∈(7π/6+2πn;17π/6+2πn,n∈z)
2
tg(x/2)≤-1
-π/4+πn≤x/2<π/2+πn,n∈x<br>x∈[-π/2+2πn;π+2πn,n∈z)
3
sin2x>√2/2
π/4+2πn<2x<3π/4+2πn,n∈z<br>x∈(π/8+πn;3π/8+πn,n∈z)
4
tg(3x-π/4)<1/√3<br>-π/2+πn<3x-π/4<π/6+πn,n∈z<br>-π/4+πn<3x<5π/12+πn,n∈z<br>x∈(-π/12+πn/3;5π/36+πn/3,n∈z)