Решите неравенство

A) (-3; 0) U [2; 4]

B) [-3; 0] U (2; 4)

C) (-∞; - 3) U (0; 2) U (4; ∞)

D) (-3; 0] U [2; 4)

Question

Саур

13 мая, 06:30

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Ответы (1)

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Абдуназар · Answer 1

4cos²x-3≥0

cos²x≥3/4

|cosx|≥√3/2

[cosx≥√3/2

[cosx≤-√3/2

1) cosx≥√3/2

-π/6+2πk≤x≤π/6+2πk

2) cosx≤-√3/2

5π/6+2πk≤x≤4π/3+2πk

Решите неравенствоA) (-3; 0) U [2; 4]B) [-3; 0] U (2; 4)C) (-∞; - 3) U (0; 2) U (4; ∞)D) (-3; 0] U [2; 4)