已知向量
,
,则下列说法错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f4dcf415977dea53f52a85b6b82136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03e5910f70c970e59cfc4f0e789b1fb2.png)
A.若![]() ![]() | B.![]() |
C.若![]() ![]() | D.若![]() ![]() ![]() |
更新时间:2023-04-14 12:57:00
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相似题推荐
单选题
|
适中
(0.65)
解题方法
【推荐1】已知向量
,
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a29b360f552c75ed218c966319f492c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008238b3748d4d201875540181515c4c.png)
A.![]() ![]() ![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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【推荐2】已知平面向量
,
,
,且
,则
( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2807ecc81d36bee4048fa4d570895d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc2cfcad001f134dfaab9460b29a3c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3862203ff99de5b95fc04927a7cf6e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36ef071c1a51c6f9b2c850a0388edea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
A.![]() | B.2或![]() | C.![]() | D.![]() |
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【推荐1】如图,圆
与
轴的上交点为
,动点
从
点出发沿圆
按逆时针方向运动,设旋转的角度
(
),向量
在
方向的射影为
(
为坐标原点),则
关于
的函数
的图像是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/74876af0-04d2-4c89-a207-87ab41d5ada7.png?resizew=121)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df9e6796f834bd176928b408a6c43c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25748fbae8b089db0b077bfc1733a89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e154ff4d600e93e8d75e74da6fa7ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58ad27f21fca5ec872bf19fa52a7899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/74876af0-04d2-4c89-a207-87ab41d5ada7.png?resizew=121)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】如图甲所示,古代中国的太极八卦图是以同圆内的圆心为界,画出相等的两个阴阳鱼,阳鱼的头部有眼,阴鱼的头部有个阳殿,表示万物都在相互转化,互相渗透,阴中有阳,阳中有阴,阴阳相合,相生相克,蕴含现代哲学中的矛盾对立统一规律. 其平面图形记为图乙中的正八边形
,其中
,则以下结论错误的是( )
![](https://img.xkw.com/dksih/QBM/2022/10/6/3082005942067200/3082676506796032/STEM/7f8d45f3033c4347a02ed0feb27ec8ac.png?resizew=268)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17d4a6cf11cda87b3dfafaecdec683f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://img.xkw.com/dksih/QBM/2022/10/6/3082005942067200/3082676506796032/STEM/7f8d45f3033c4347a02ed0feb27ec8ac.png?resizew=268)
A.![]() |
B.![]() |
C.![]() |
D.![]() ![]() ![]() |
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【推荐3】下列说法中错误的个数是( )
(1)已知
,
,则
与
不能作为平面内所有向量的一组基底
(2)若
与
共线,则
在
方向上的投影数量为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a67b29711bb464e3c8baf3dcc64ac9.png)
(3)若两非零向量
,
满足
,则
与
的夹角是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(4)已知
,
且
与
夹角为锐角,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d7282d804f282fe04d37e2972b42e.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f94d2e7874dd3545b8f1b66de0dfee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0fac9ea2645f37ffd44407d5c89b8c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a67b29711bb464e3c8baf3dcc64ac9.png)
(3)若两非零向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da6715fcf9f94ab6ec41fdd32d00f82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ca43808974777649a58258de1436d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(4)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779d3b960e7c55f1eb8182e21f16bd4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e878a887d0653f8b66ee3d2ead86b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce0d4e7f1d27f8680e2d0b97437e205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d7282d804f282fe04d37e2972b42e.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
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解题方法
【推荐1】在等腰直角三角形ABC中,
,面积为1,则下列结论错误的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2159a60506c83de4834adea5b97d95.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
【推荐2】已知向量
,
,
,设与
方向相同的单位向量为
,则向量
在向量
上的投影向量为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f4dcf415977dea53f52a85b6b82136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5342619c0412f1d45b2a40be29086a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74727d4aa6a107890efffce933105712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c984376f5475184e0d3e4f7e1bb65f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次