如图,在等腰
中,
,
,
为
内一点,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4952d285173a0416e943e1ef5aac4f74.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9b0d3cf342e065b4c8e21443bfbfbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59798989a286cbf711be156b28e6b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4952d285173a0416e943e1ef5aac4f74.png)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763408537804800/2766920981848064/STEM/4dc9a532-34bd-4737-b88d-30416bdf49f5.png?resizew=239)
更新时间:2021-07-18 15:38:03
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【推荐2】已知
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________ .
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