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用初等方法先证明一个不等式,然后再对文[1]中的三角函数最值命题进行推广,得到推广1.最后,用导数作进一步推广,得到推广2.
First prove an inequality by the elementary method, and then generalize the most value proposition of the trigonometric function in [1], and obtain the generalization 1. Finally, use the derivative to further generalize and get the extension 2.