解题方法
1 . 如图,在△OAB中,已知M为线段AB上的一点,
.
(1)求证:
;
(2)若
,
,
,且
与
的夹角为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1069927f6bbd5226f66f99ef5e016a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/67f92962-3ab0-4511-aa6f-1c42fbd39f57.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5558c083d34cbb0a58d3ce1dc6f5778e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8fa561a0bbdcabe625904937d40ca4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80fd2649256ec91e6552a9068e04615d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b3e881a69dbca4cb697129b0b6a23f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e071d1a298669dacac7e86c26fca81c9.png)
您最近一年使用:0次
名校
解题方法
2 . 在平行四边形
中,若
,
,
(
),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307ee7cd05464e2c654802989aacc45f.png)
____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39fb0d778fb161ca952148d273edc49f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34bf506f6563d727f3a3f92e3b8d060c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a3dcd4bd45139d741da9c39fd9f5f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa72c594ebe33496fa7b9edf1db5c7e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307ee7cd05464e2c654802989aacc45f.png)
您最近一年使用:0次
2022-07-04更新
|
321次组卷
|
3卷引用:广西北海市2021-2022学年高一下学期期末检测数学试题
广西北海市2021-2022学年高一下学期期末检测数学试题(已下线)高一下学期期末真题精选(易错60题20个考点专练)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)贵州省黔东南州榕江县第一中学2022-2023学年高二上学期开学考试数学试题