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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality cos(x) >= -(1/2) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         cos ( x ) >= -( 1 / 2 )         (1)

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    From inequality(1)：
         -14.660766 ≤ x ≤ -10.471976 或  -8.37758 ≤ x ≤ -4.18879 或  -2.094395 ≤ x ≤ 2.094395 或  4.18879 ≤ x ≤ 8.37758 或  10.471976 ≤ x ≤ 14.660766

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    The final solution set is :
         -14.660766 ≤ x ≤ -10.471976 或  -8.37758 ≤ x ≤ -4.18879 或  -2.094395 ≤ x ≤ 2.094395 或  4.18879 ≤ x ≤ 8.37758 或  10.471976 ≤ x ≤ 14.660766
    *Note: Radian.

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