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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0.358061005000000*2 <= sin(a) <= 0.767742669129844*2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0.358061005000000 * 2 <= sin ( a )         (1)
         sin ( a ) <= 0.767742669129844 * 2         (2)

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    From inequality(1)：
         a ≤ -16.506194 或  -11.76814 ≤ a ≤ -10.223008 或  -5.484955 ≤ a ≤ -3.939823 或  0.79823 ≤ a ≤ 2.343362 或  7.081416 ≤ a ≤ 8.626548 或  a ≥ 13.364601
    From inequality(2)：
         a ∈ R (R is all real numbers),that is, in the real number range, the inequality is always established!

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    From inequalities (1) and (2)
         a ≤ -16.506194 或  -11.76814 ≤ a ≤ -10.223008 或  -5.484955 ≤ a ≤ -3.939823 或  0.79823 ≤ a ≤ 2.343362 或  7.081416 ≤ a ≤ 8.626548 或  a ≥ 13.364601    (3)

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    The final solution set is :
         a ≤ -16.506194 或  -11.76814 ≤ a ≤ -10.223008 或  -5.484955 ≤ a ≤ -3.939823 或  0.79823 ≤ a ≤ 2.343362 或  7.081416 ≤ a ≤ 8.626548 或  a ≥ 13.364601
    *Note: Radian.

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