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

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

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    From inequality(1)：
         -14.517673 < x < -11.376081 或  -8.234488 < x < -5.092895 或  -1.951303 < x < 1.19029 或  4.331883 < x < 7.473475 或  10.615068 < x < 13.756661

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    The final solution set is :
         -14.517673 < x < -11.376081 或  -8.234488 < x < -5.092895 或  -1.951303 < x < 1.19029 或  4.331883 < x < 7.473475 或  10.615068 < x < 13.756661
    *Note: Radian.

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