解题方法
1 . 如图在
中,
,满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/7deabe43-a08d-49bf-8a04-310fcaec5e0e.png?resizew=152)
(1)若
试求
和
的值
(2)若
,求
的余弦值;
(3)点M是线段CD上一点,且满足
,若
的面积为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d11a5a756d8fdd7b294c4f5fd63467b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e1e333389c550c4f666108da99f837.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/7deabe43-a08d-49bf-8a04-310fcaec5e0e.png?resizew=152)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124085573ee2eaa1bc4d822a2fe5f925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee63d7a67287c5254793609eef77f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
(3)点M是线段CD上一点,且满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a93b5d1c42f97fe314872539b37f10cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745fdeb8e2f050da817a2e497432bcd0.png)
您最近一年使用:0次
2021-07-10更新
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359次组卷
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2卷引用:湖北省鄂州市鄂东高级中学2020-2021学年高一下学期5月联考数学试题