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[函数] 一道与三角函数有关题目

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lemondian Posted 2019-1-7 09:50 |Read mode

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isee Posted 2019-1-7 10:23

回复 1# lemondian

选A，楼主有什么疑问？去分母，数形结合一下，相切，求个导，斜率建等关系

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Author| lemondian Posted 2019-1-7 10:40

回复 2# isee
想看看有没有其它解法

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敬畏数学 Posted 2019-1-7 11:39

很正常的一题，没有不要再折腾。

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其妙 Posted 2019-1-8 00:22

答案参看这里：blog.sina.com.cn/s/blog_54df069f0102ymy4.html

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