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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality abs(sin(x)*x) ≥abs(x) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         abs ( sin ( x ) * x ) ≥ abs ( x )         (1)

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    From inequality(1)：
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!

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    The final solution set is :
        x ∈ Φ (Φ is empty)that is, the inequality will never be estatlished within the real number range!
    *Note: Radian.

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