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DelightRun avatar DelightRun commented on August 28, 2024

这就是余弦定理的公式啊:

cos A = (b²+c²-a²)/2bc

只是代码里算距离的函数默认算出来的是没开根号前的欧氏距离,带入余弦定理公式就是这个形态了。

from ssg.

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