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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality cos（0.68-x）-0.4sin（0.68-x） >0 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         cos ( 0.68 - x ) - 0.4 * sin ( 0.68 - x ) >0         (1)

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    From inequality(1)：
         -13.076661 < x < -9.935068 或  -6.793475 < x < -3.651883 或  -0.51029 < x < 2.631303 或  5.772895 < x < 8.914488 或  12.056081 < x < 15.197673

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    The final solution set is :
         -13.076661 < x < -9.935068 或  -6.793475 < x < -3.651883 或  -0.51029 < x < 2.631303 或  5.772895 < x < 8.914488 或  12.056081 < x < 15.197673
    *Note: Radian.

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