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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality (e^x)×（cosx-sinx） ≥1 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         ( e ^ x ) × ( cos x - sin x ) ≥1         (1)

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    From inequality(1)：
         3.940733 ≤ x ≤ 7.067981 或  10.210202 ≤ x ≤ 13.351768 或  16.493361 ≤ x ≤ 19.634954 或  22.776547 ≤ x ≤ 25.918139

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    The final solution set is :
         3.940733 ≤ x ≤ 7.067981 或  10.210202 ≤ x ≤ 13.351768 或  16.493361 ≤ x ≤ 19.634954 或  22.776547 ≤ x ≤ 25.918139
    *Note: Radian.

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