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

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

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    From inequality(1)：
         -14.137167 < x < -9.424778 或  -7.853982 < x < -3.141593 或  -1.570796 < x < 3.141593 或  4.712389 < x < 9.424778 或  10.995574 < x < 15.707963

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    The final solution set is :
         -14.137167 < x < -9.424778 或  -7.853982 < x < -3.141593 或  -1.570796 < x < 3.141593 或  4.712389 < x < 9.424778 或  10.995574 < x < 15.707963
    *Note: Radian.

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