Задача 56290 f(x)=sqrt(cos6x)...

5fdf1959ec9d2930a089935c

20.12.2020 12:30:07

f(x)=sqrt(cos6x)

5f3ea7e3faf909182968ddd9

20.12.2020 13:36:26

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[m]cos6x ≥ 0[/m]

[m]-\frac{π}{2}+2πn ≤ 6x ≤ \frac{π}{2}+2πn, n ∈ Z[/m]

Делим на 6 и получаем ответ:

[m]-\frac{π}{12}+\frac{π}{3}\cdot n ≤ 6x ≤ \frac{π}{12}+\frac{π}{3}\cdot n, n ∈ Z[/m]