Overview: 1 questions will be solved this time.Among them
           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality cos（2x＋π/6） ≥1/2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         cos ( 2 * x + π / 6 ) ≥1 / 2         (1)

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    From inequality(1)：
         -7.068583 ≤ x ≤ -6.021386 或  -3.926991 ≤ x ≤ -2.879793 或  -0.785398 ≤ x ≤ 0.261799 或  2.356194 ≤ x ≤ 3.403392 或  5.497787 ≤ x ≤ 6.544985

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    The final solution set is :
         -7.068583 ≤ x ≤ -6.021386 或  -3.926991 ≤ x ≤ -2.879793 或  -0.785398 ≤ x ≤ 0.261799 或  2.356194 ≤ x ≤ 3.403392 或  5.497787 ≤ x ≤ 6.544985
    *Note: Radian.

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