Ответ:(π/3+2πn;5π/3+2πn),n∈z
Объяснение:2cosx<1;
cosx<1/2; π/3+2πn<x<5π/3+2πn,n∈z
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Ответ:(π/3+2πn;5π/3+2πn),n∈z
Объяснение:2cosx<1;
cosx<1/2; π/3+2πn<x<5π/3+2πn,n∈z