已知在
中,角A,B,C所对边分别为a,b,c,已知
.
(1)求角C的大小;
(2)若
,
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4533db868e3ce7f5b20fab761b596ac8.png)
(1)求角C的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07abc09e1f0bf5eb87259e3381b3316a.png)
更新时间:2021-07-10 15:31:59
|
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】在
中,是
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所对应的分边别为
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,且满足
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;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】在
中,角
的对边分别为
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.
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为锐角,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8607bde1fa6cde631a46e921d959a0.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d09196d6643e64ab5b9b5df02d98a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/716efc789870f93f49ac009730ac54bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐1】已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e9b93bca9be24cd67274a3fc412dec.png)
(1)求A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9766dfef2a4159f49c7bd349fb36d670.png)
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(3)若AB边上的中点为D,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
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解答题-问答题
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适中
(0.65)
【推荐2】在△ABC中,已知
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a1fc2305fd371a1ff1f91cd834140e8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2275356114fd7091f36de0a60b73ce77.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】在
中,角A,B,C的对边分别为a,b,c,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/29a677c3-319b-4fdb-81d0-113d80063dbc.png?resizew=190)
(1)求证:
;
(2)如图:点
在线段
上,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b269069e460c7ab1d90ee9bac7bd876.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/29a677c3-319b-4fdb-81d0-113d80063dbc.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa8d75a6638e08eedbff8662267da6f.png)
(2)如图:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa6361e919ac07ee6ed642556e1d1ae.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
【推荐2】在
中,角A,B,C所对的边分别为a,b,c,且
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(1)求角C的大小;
(2)若
,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1a84985f8a6a08c32a1e0ff86ad97.png)
(1)求角C的大小;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd04c6b9cc47521108979a622c2b7c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3314c58e9524400daffdd00b2df780c0.png)
您最近一年使用:0次