Задание во вложении.

Question

Задание во вложении.

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Answer 1

Сosx≤5/6
x∈-arccos5/6+2πk;arccos5/6+2πk,k∈z]

sinx>1/8
x∈(arcsin1/8+2∈z)

ctgx≤-√3/3
x∈[-π/3+πk;πk,k∈z)