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

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

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    From inequality(1)：
         x < -11.025811 或  -7.811295 < x < -4.782149 或  -1.314394 < x < -0.355576 或  1.761209 < x < 4.640496 或  7.896209 < x < 10.96517 或  x ＞ 14.160708

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    The final solution set is :
         x < -11.025811 或  -7.811295 < x < -4.782149 或  -1.314394 < x < -0.355576 或  1.761209 < x < 4.640496 或  7.896209 < x < 10.96517 或  x ＞ 14.160708
    *Note: Radian.

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