Ответы
Ответ дал:
0
[cosx≤-1/2⇒x∈[2π/3+2πn;4π/3+2πn,n∈z]
[cosx≥1/2⇒x∈[-π/3+2πn;π/3+2πn,n∈z]
x∈[-π/3+2πn;π/3+2πn,n∈z] U [2π/3+2πn;4π/3+2πn,n∈z]
[cosx≥1/2⇒x∈[-π/3+2πn;π/3+2πn,n∈z]
x∈[-π/3+2πn;π/3+2πn,n∈z] U [2π/3+2πn;4π/3+2πn,n∈z]
Похожие вопросы
2 года назад
7 лет назад
10 лет назад