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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality xcosxcosx >-1/3 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x * cos x * cos x > -1 / 3         (1)

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    From inequality(1)：
         -4.974238 < x < -4.43467 或  -1.992205 < x < -0.928224 或  x ＞ -0.389493

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    The final solution set is :
         -4.974238 < x < -4.43467 或  -1.992205 < x < -0.928224 或  x ＞ -0.389493
    *Note: Radian.

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