已知向量
,
,
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c346e10de60ed993ca39434eecdc655f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821212cc196c948947d24a01154038c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228cb036f045c2a57cc21e8ed79f19c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54602326bd6dbf8a90583930fde050e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff35f868ac0388a82af7dd7a97df0d03.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-04-15 11:11:06
|
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单选题
|
适中
(0.65)
名校
解题方法
【推荐1】设
的内角
,
,
所对的边长分别为
,
,
,若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c50dcf692b54ea9c3ee09f7e7a595295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4239165ee886662653d8da4c567a79d.png)
A.![]() | B.![]() | C.2 | D.4 |
您最近一年使用:0次
单选题
|
适中
(0.65)
解题方法
【推荐2】已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdfc9192f40e0cca280cd20261b5e1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b7bb3b77f1d0ce1c2cea6de5889c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7488726a4bef802686c0023caa3a6fff.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐3】已知
是第二象限角,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ef0fa406fe7609b3b12dcb33c5c6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127528f27e547b5641497e6b93f05ba1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】若方程
的两根为
,
,其中A,B为三角形内角,则实数p的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75c917c4c03ddbb78405354b44c01aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a24a8f5e8fb89381f8add6549170345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐1】已知菱形
的边长为3,
,点
在边
上,且
,若
为线段
上的动点,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23765c24685e870327175b1cdbceb0ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59809f2fa9ce4c833cdf5fe102feb8d8.png)
A.9 | B.6 | C.![]() | D.18 |
您最近一年使用:0次
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【推荐2】已知点
,则
在
上的投影向量为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2b84e6349a2a490d0f9a796328038d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5f1b06a56fc382feed28e01f1ad102.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次