在
中,已知
,若
,D为
的中点,则
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc50fdeea7eb205e0cfc003090bb5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/133760237c0ccf2d6a83786925b6d23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
20-21高二上·浙江·期中 查看更多[2]
更新时间:2020-11-26 23:33:34
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解题方法
【推荐1】已知数列
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【推荐2】在
中,内角
、
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的对边分别为
、
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,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e3fc39d2b508cc1cae769a5e7266c0.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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解题方法
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您最近一年使用:0次
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解题方法
【推荐2】在
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