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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality sin(2x)*(11cos(2x-120)-16.5) >20 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         sin ( 2 * x ) * ( 11 * cos ( 2 * x - 120 ) - 16.5 ) >20         (1)

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    From inequality(1)：
         x < -6.949087 或  -4.300778 < x < -3.807494 或  -1.159185 < x < -0.665902 或  1.982407 < x < 2.475691 或  5.124 < x < 5.617284 或  x ＞ 8.265593

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    The final solution set is :
         x < -6.949087 或  -4.300778 < x < -3.807494 或  -1.159185 < x < -0.665902 或  1.982407 < x < 2.475691 或  5.124 < x < 5.617284 或  x ＞ 8.265593
    *Note: Radian.

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