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

[ 1/1Inequality]
    Assignment:Find the solution set of inequality 3(sinx)^2+(cosx)^2 <2 .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
        3 * ( sin x ) ^ 2 + ( cos x ) ^ 2 <2         (1)

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    From inequality(1)：
         -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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    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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