Ответ:
cos2x = ½
x = ±2
±2π/3 + 2πn, n ∈ Z
Пoшаговое объяснение:
cos2x = –1/2
2x = ±arccos(-1/2) + 2πn, n ∈ Z
2x = ±(π - π/3) + 2πn, n ∈ Z
x = ±2π/3 + 2πn, n ∈ Z
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Ответ:
cos2x = ½
x = ±2
±2π/3 + 2πn, n ∈ Z
Пoшаговое объяснение:
cos2x = –1/2
2x = ±arccos(-1/2) + 2πn, n ∈ Z
2x = ±(π - π/3) + 2πn, n ∈ Z
x = ±2π/3 + 2πn, n ∈ Z