若平面向量
,
,
两两夹角相等,且
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37564ec4e9e92485f1769e8ffaac31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e8744362c6e224146461b97faf9821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da379cb8150c40e1f5c838be5a574751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d59e1b0b14d7aebd0a62e985d145d34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bca8c29cf4f1c6f6cf264142ee4337.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018b2ae7a05af196afbd8942c3056630.png)
A.49 | B.7 | C.49或7 | D.7或![]() |
更新时间:2024-05-22 20:49:24
|
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单选题
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适中
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解题方法
【推荐1】已知单位向量
满足
,则
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8bdfc7523cf343459a86dbb7bf0b0b2.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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适中
(0.65)
名校
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【推荐2】如图,
半径为
为圆上两点,若
,则
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![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/24/46753d90-6a88-46df-b09c-8c6bf6e4fbab.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b24b22a725081f81a07632c6b77d69ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2596ac1a8301e39179b80fbd3bd3169.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42acd3ee01d9f843a8579ffb0b7d9d82.png)
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A.4 | B.2 | C.![]() | D.![]() |
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【推荐1】向量
,
的模长为正整数,且满足
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/035d591976933cd046cbb633e315577d.png)
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A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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(0.65)
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【推荐2】已知D是△ABC的边AB的中点,且△ABC所在平面内有一点P,使得
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ffea8ab0ef883f73afdcb567b329d17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
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您最近一年使用:0次