Overview: 2 questions will be solved this time.Among them
           ☆2 inequalities

[ 1/2Inequality]
    Assignment:Find the solution set of inequality 0.25π <= x <= 2.25π .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0.25 * π <= x         (1)
         x <= 2.25 * π         (2)

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    From inequality(1)：
         x ≥ 0.785398
    From inequality(2)：
         x ≤ 7.068583

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    From inequalities (1) and (2)
         0.785398 ≤ x ≤ 7.068583    (3)

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    The final solution set is :
         0.785398 ≤ x ≤ 7.068583
[ 2/2Inequality]
    Assignment:Find the solution set of inequality sinx >= cosx .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         sin x >= cos x         (1)

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    From inequality(1)：
         x ≤ -14.922565 或  -11.780972 ≤ x ≤ -8.63938 或  -5.497787 ≤ x ≤ -2.356194 或  0.785398 ≤ x ≤ 3.926991 或  7.068583 ≤ x ≤ 10.210176 或  x ≥ 13.351769

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    The final solution set is :
         x ≤ -14.922565 或  -11.780972 ≤ x ≤ -8.63938 或  -5.497787 ≤ x ≤ -2.356194 或  0.785398 ≤ x ≤ 3.926991 或  7.068583 ≤ x ≤ 10.210176 或  x ≥ 13.351769
    *Note: Radian.

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