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

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

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    From inequality(1)：
         x ≤ -13.089969 或  -8.901179 ≤ x ≤ -6.806784 或  -2.617994 ≤ x ≤ -0.523599 或  3.665191 ≤ x ≤ 5.759587 或  9.948377 ≤ x ≤ 12.042772 或  x ≥ 16.231562

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    The final solution set is :
         x ≤ -13.089969 或  -8.901179 ≤ x ≤ -6.806784 或  -2.617994 ≤ x ≤ -0.523599 或  3.665191 ≤ x ≤ 5.759587 或  9.948377 ≤ x ≤ 12.042772 或  x ≥ 16.231562
    *Note: Radian.

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