From 0252437db8209e885f99059d1c443198c346483b Mon Sep 17 00:00:00 2001
From: lcw <ez_lcw@foxmail.com>
Date: Thu, 30 Nov 2023 00:43:16 +0800
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 至此，我们定义完了所有基本三角函数。它们也有相应的几何含义：
 
-![](pic\~9.1.1.png)
+![](https://z1.ax1x.com/2023/11/30/pirCmXF.png)
 
 三角函数有大量的公式，熟悉这些公式对今后的学习是必要的。