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[函数] 三角函数值域

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hjfmhh Posted 2020-3-17 15:36 |Read mode
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力工 Posted 2020-3-17 22:41
回复 1# hjfmhh
原来就是两点距离和的展开吧?$\sqrt{(cosx+\frac{1}{2})^2+sin^2 x}+\sqrt{(cosx-\frac{1}{4})^2+(sinx-\frac{\sqrt{3}}{4})^2}$
初等方法不好求,主要是渣渣不会求。

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isee Posted 2020-3-17 23:25
回复 2# 力工

这么一换,感觉还有椭圆有点牵扯。。。

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