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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality sina >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         sin a >0         (1)

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    From inequality(1)：
         a < -15.707963 或  -12.566371 < a < -9.424778 或  -6.283185 < a < -3.141593 或  0 < a < 3.141593 或  6.283185 < a < 9.424778 或  a ＞ 12.566371

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    The final solution set is :
         a < -15.707963 或  -12.566371 < a < -9.424778 或  -6.283185 < a < -3.141593 或  0 < a < 3.141593 或  6.283185 < a < 9.424778 或  a ＞ 12.566371
    *Note: Radian.

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