Все ответы на единичной окружности
1) Sinx ≥√2/2
π/4 + 2πk ≤ x ≤ 3π/4 + 2πk , k ∈Z
2) Sinx < -√3/2
-2π/3 + 2πk < x < π/6 + 2πk, k ∈Z<br>3)Sinx ≥1/2
π/6 + 2πk < x < 5π/6 + 2πk , k ∈Z
4) Sinx < - 1/2
-3π/4 + 2πk < x < -π/4 + 2πk, k ∈Z
5) Cosx ≥ -1/2
-2π/3 +2πk ≤ x ≤ 2π/3 + 2πk , k ∈Z
6) Cosx ≥√3/2
-π/6 + 2πk ≤x ≤ π/6 + 2πk , k∈Z
7) Cosx < √2/2<br>π/4 + 2πk < x < 7π/4 + 2πk, k ∈ Z
8)Cosx < -√2/2
3π/4 + 2πk < x < 5π/4 + 2πk , k ∈Z