解题方法
1 . 在
中,已知
,
,
.
(1)求角
;
(2)若
为锐角三角形,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf37709e1140f20b7a405e20d6e32060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1f4f255d191786f7d330d278868c2d.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147ab2d582e60bee6d81b27236e7288b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b785ebbf5889849e872f461669f71.png)
您最近一年使用:0次
名校
解题方法
2 . 已知向量
.
(1)求证:
三点共线.
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5339824070d6457ce3459522ccc2b4af.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65183d238c9bc2be73770717d890683.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65df426520c01cae1e7f0f52cd712c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2022-09-13更新
|
1677次组卷
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5卷引用:贵州省黔南州罗甸县第一中学2022-2023学年高二上学期开学入学考数学试题