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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality -23.5cos（0.4t）+25 >30 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        -23.5 * cos ( 0.4 * t ) + 25 >30         (1)

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    From inequality(1)：
         t < -35.87893 或  -26.952924 < t < -20.170966 或  -11.24496 < t < -4.463003 或  4.463003 < t < 11.24496 或  20.170966 < t < 26.952924 或  t ＞ 35.87893

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    The final solution set is :
         t < -35.87893 或  -26.952924 < t < -20.170966 或  -11.24496 < t < -4.463003 或  4.463003 < t < 11.24496 或  20.170966 < t < 26.952924 或  t ＞ 35.87893
    *Note: Radian.

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