名校
1 .
为
所在平面内一点,
,
,则
的面积等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095d0a21eec05c53f8e41fcddf457e21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4b739d5abd96a917a578277a859f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-08-28更新
|
343次组卷
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2卷引用:四川省南充高级中学2020-2021学年高一下学期期中考试数学(理)试题
名校
解题方法
2 . 如图,已知
与
的夹角为
,
,
,
,
,
与
相交于点
.
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763452371599360/2776599745699840/STEM/880b66b25aee4d68ae29e0337713894c.png?resizew=284)
(1)求
;
(2)求
与
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7b5adfcac0f46a4cd19da4ebb4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee8d11df73620fc727f432c78db370e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff83ce1a2d686d750bb10a96362fbe24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763452371599360/2776599745699840/STEM/880b66b25aee4d68ae29e0337713894c.png?resizew=284)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a97d52af0cd55d4008f31803cd20375a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d130479bfa4799d691ef28d5c441a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3102e0c49710e3fdd30451516110ecb3.png)
您最近一年使用:0次
2021-08-01更新
|
330次组卷
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4卷引用:四川省绵阳市2020-2021学年高一下学期期末数学理科试题
四川省绵阳市2020-2021学年高一下学期期末数学理科试题四川省遂宁市射洪中学2021-2022学年高一上学期第三次(12月)月考(强基班)数学试题四川省德阳中学校2021-2022学年高一下学期期末适应性考试数学试题(已下线)第05讲 平面向量的应用-《知识解读·题型专练》(人教A版2019必修第二册)