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战巡 发表于 2022-5-16 19:58 正弦定理可得 \[\frac{AP}{\sin(\angle ACP)}=\frac{AC}{\sin(\angle APC)}\] 然后显然$\angle APB=360\du- ...
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isee 发表于 2022-5-16 20:51 哎呀,好久不见你这头像了,好亲切,感谢战版
色k 发表于 2022-5-16 21:13 旧论坛不是这个头像吗?
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2025-7-15 14:59 GMT+8
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