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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 0 <(cosx)^2 >1/2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 2 inequalities：
        0 < ( cos x ) ^ 2         (1)
         ( cos x ) ^ 2 >1 / 2         (2)

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    From inequality(1)：
         x < -3926991/500000 或  -3926991/500000 < x < -4712389/1000000 或  -4712389/1000000 < x < -1570797/1000000 或  -1570797/1000000 < x < 1570797/1000000 或  1570797/1000000 < x < 4712389/1000000 或  4712389/1000000 < x < 3926991/500000 或  x ＞ 3926991/500000
    From inequality(2)：
         -7.068583 < x < -5.497787 或  -3.926991 < x < -2.356194 或  -0.785398 < x < 0.785398 或  2.356194 < x < 3.926991 或  5.497787 < x < 7.068583

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    From inequalities (1) and (2)
         -7.068583 < x < -5.497787 或  -3.926991 < x < -2.356194 或  -0.785398 < x < 0.785398 或  2.356194 < x < 3.926991 或  5.497787 < x < 7.068583     (3)

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    The final solution set is :
         -7.068583 < x < -5.497787 或  -3.926991 < x < -2.356194 或  -0.785398 < x < 0.785398 或  2.356194 < x < 3.926991 或  5.497787 < x < 7.068583
    *Note: Radian.

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