已知
是平面内两个夹角为
的单位向量,设
为同一平面内的两个向量,若
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111939547e581e8bf029a241b9e9cb05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd246148371f6f825f94e68480190f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e612defe0bcb4ecdbaae934247ea9df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d73e5a7d6ead7f895d659d604959d9c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2021-05-06 14:24:05
|
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】点
是圆
上的任一点,圆
是过点
且半径为1的动圆,点
是圆
上的任一点,则
长度的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cb44c38978960d50e8fd47220ee2372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c0317631fd145d5c5f1e85ed8841d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
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适中
(0.65)
名校
【推荐2】过圆
:
上的点
作圆
:
的切线,切点为
,则切线段
长为整数的切线条数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c8fd43588e3d6a8098725ead54ff6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
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适中
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解题方法
【推荐1】已知两点
,
,则与向量
同向的单位向量是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56339a78e814bc0cb8f45cb2e23515bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bff40cb415020fadf6160eb02390637c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abcb5d89b04570ceda2c29e11cb27a57.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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适中
(0.65)
解题方法
【推荐2】平面向量
与
的夹角为
,
,
,则
( )
![](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/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e158a53b1b67708aea049a3acde3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed13f678d9d69e61ec74d8dcedce3764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4247a5aa34b3e197b79719e8606b02f6.png)
A.![]() | B.![]() | C.4 | D.1 |
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