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

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

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    From inequality(1)：
         x < -17.220755 或  -14.066194 < x < -10.904122 或  -7.725252 < x < -4.493409 或  0 < x < 4.493409 或  7.725252 < x < 10.904122 或  x ＞ 14.066194

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    The final solution set is :
         x < -17.220755 或  -14.066194 < x < -10.904122 或  -7.725252 < x < -4.493409 或  0 < x < 4.493409 或  7.725252 < x < 10.904122 或  x ＞ 14.066194
    *Note: Radian.

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