12-13高一下·江苏盐城·期末
名校
解题方法
1 . 在边长为1的等边
中,设
,
,
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fdf6f4e96b231e2802b5d6059451534.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7009c25899887e6df12cbc80034cb39f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84eca96d76aebf52827bb14b41c22fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8392cfcfc4a0788662fae155a88adf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fdf6f4e96b231e2802b5d6059451534.png)
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