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

[ 1/2 Equation]
    Work: Find the solution of equation 16.2-16.4/x*sin(x)-0.6*sin(x) = 0 .
    Question type: Equation
    Solution:
    The solution of the equation:
        x₁≈-0.182640 , keep 6 decimal places
        x₂≈0.399877 , keep 6 decimal places    
    There are 2 solution(s).    *Note: Radian.

解程的详细方法请参阅：《方程的解法》
[ 2/2Inequality]
    Assignment:Find the solution set of inequality x >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         x >0         (1)

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    From inequality(1)：
         x ＞ 0

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    The final solution set is :
         x ＞ 0

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