在
中,角A、B、C所对的边分别为a,b,c,已知
,则
的面积为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74ad3c387639b18612a656ec6d1207a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
更新时间:2020-12-13 11:21:26
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【推荐2】
的内角A,B,C的对边分别为a,b,c,已知
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fade7d9c2da07d3d1416b8d07665aa1.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15b61511b52a83af39699353437c035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079bdbb922d3d171902f66ec8832a9a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87bc22d2d4623e5f31647301ddc92cbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fade7d9c2da07d3d1416b8d07665aa1.png)
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【推荐1】在
中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79da421353ad74da1098269cc4d2829.png)
_______ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6748e4496d0b9cd32b8286f42b42be0a.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f5cf5635ea9d39c8b342d12dcc790c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79da421353ad74da1098269cc4d2829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6748e4496d0b9cd32b8286f42b42be0a.png)
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解题方法
【推荐2】在△ABC中,D是BC上的点,AD平分
,△ABD面积是△ADC面积的2倍.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef54d9813c8852713ce9f3e7c31d6872.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef54d9813c8852713ce9f3e7c31d6872.png)
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