Ответы на вопрос:
√3/2cosx+1/2sinx≤√2/2 cosπ/6cosx+sinπ/6sinx≤√2/2 cos(π/6-x)≤√2/2 π/4+2πn≤π/6-x≤7π/4+2πn π/12+2πn≤-x≤19π/12+2πn -19π/12-2πn≤x≤-π/12-2πn ответ: [-19π/12-2πn; -π/12-2πn]
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