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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 2500 >((2.47sin3x-10)/tan30-21.65+21.65cos3x)^2+100 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        2500 > ( ( 2.47 * sin 3 * x - 10 ) / tan 30 - 21.65 + 21.65 * cos 3 * x ) ^ 2 + 100         (1)

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    From inequality(1)：
         -3.214789 < x < 1.344998

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    The final solution set is :
         -3.214789 < x < 1.344998
    *Note: Radian.

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