2013·安徽马鞍山·三模
解题方法
1 . 在△ABC中,已知
与
的夹角为150°,
,则
的取值范围是_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1da92a2fc2ce861e82f7192fe4e648f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c452e3eef88c7be0f35d693cb90a0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a82652fe81f3a2a0aae2ece0f50b30.png)
您最近一年使用:0次
2016-12-02更新
|
1032次组卷
|
5卷引用:广东省汕头市潮南区陈店实验学校2021-2022学年高二上学期期中数学试题
11-12高二上·辽宁营口·期末
名校
2 . 若
,则
的形状是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e1222b82e7c7e446fb415c8c37e72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
A.不等边锐角三角形 | B.直角三角形 |
C.钝角三角形 | D.等边三角形 |
您最近一年使用:0次
2016-11-30更新
|
1074次组卷
|
6卷引用:广东省潮州市湘桥区南春中学2021-2022学年高二上学期第一次月考数学试题
广东省潮州市湘桥区南春中学2021-2022学年高二上学期第一次月考数学试题(已下线)2010—2011学年辽宁省营口市普通高中高二上学期期末教学质量检测理科数学(已下线)新课标版高二数学选修2-1空间向量与立体几何(陕西2)(已下线)2011—2012学年辽宁省沈阳二中高二下学期期中考试理科数学试卷重庆市开州中学2021-2022学年高二上学期第一次月考数学试题河北省邯郸市魏县第五中学2022-2023学年高二上学期第二次月考数学试题
名校
3 . 已知
,
,
,则
与
夹角的度数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fb441b1aef7942c6caebe7a58de5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fa8ea29001bb1f0c1e5157aff2fca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ba996f653018f51802b36617c0923b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
2016-12-03更新
|
719次组卷
|
3卷引用:2014-2015学年广东省揭阳一中高二上学期期末考试文科数学试卷
4 . 已知向量
满足
,且
,则
与
的夹角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69613bda5b1face9751a8c13ae757ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f836d905839bfafd9a4131b4eb18ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb185c1a3fb3abe9088ed5250ad554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b5960e052f614ae45628785cb2cbf4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
5 . 已知向量
=(1,1,0),
=(﹣1,0,2)且k
+
与2
﹣
互相垂直,则k的值是
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/2091ca1c9c604c2d902c75c82e4179c6.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/7820e57fb0414345ad7512debbe11f30.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/28db5c088b9b4c478b62fc31ce9d3b44.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/cc6ba9b8b37843649769aa4c65614d76.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/28db5c088b9b4c478b62fc31ce9d3b44.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/cc6ba9b8b37843649769aa4c65614d76.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
209次组卷
|
4卷引用:2015-2016学年广东省普宁一中高二下学期第二次月考理科数学试卷
6 . 平面上定点
、
距离为4,动点
满足
,则
的最小值是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5135e391e283bd02108e946434581853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b89444b3f24abfd7b0d4f0f9090013f.png)
A.![]() | B.![]() | C.![]() | D.5 |
您最近一年使用:0次