108
a)x∈(2πk;π+2πk,k∈z)
б)x∈(-π/2+πk;πk,k∈z)
в)x∈(π/2+2πk;π/2+2πk,,k∈z)
г)x∈(πk;π/2+πk,,k∈z)
109
а)x∈[π/6+2πk;5π/6+2πk,k∈z]
б)x∈[2π/3+2πk;7π/3+2πk,,k∈z]
в)x∈[-π/6+2πk,π/6+2πk,,k∈z]
г)x∈(-π/2+πk;-π/6+πk,,k∈z]
110
а)-π/6=2πk≤5x≤7π/6+2πk
x∈[-π/30+2πk/5;7π/30+2πk/5,,k∈z]
б)-π/4+πk<2x<π/2+πk<br>x∈(-π/8+πk/2;π/4+πk/2,,k∈z)
в)π/3+2πk<8x<5π/3+2πk<br>x∈(π/24+πk/4;5π/24+πk/4,,k∈z)
г)3π/4+πk≤3x<π+πk<br>x∈[π/4+πk/3;π/3+πk/3)