题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080625-34712.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080625-34834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080626-32235.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080626-48108.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080626-68111.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080625-34834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080626-48108.gif)
A.30° | B.60° | C.120° | D.150° |
答案
解析
核心考点
试题【若是夹角为600的两个单位向量,=2,=,则与的夹角为( )A.30°B.60°C.120° D.150°】;主要考察你对平面向量数量积的意义等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080621-25995.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080622-99121.gif)
(I)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-12970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-96115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-65036.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-65036.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-12970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-96115.gif)
(II)已知|
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-12970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080614-67727.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-96115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-12970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-96115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-12970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-96115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-12970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080613-96115.gif)
设
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080604-51059.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080604-55931.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080605-23959.gif)
(I)记
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080605-64089.gif)
(II)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080605-27542.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080605-58521.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080600-78505.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080551-33894.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080551-41394.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080551-40577.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080551-17445.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080551-64843.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080552-65289.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080552-83724.gif)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080551-33894.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080551-41394.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104080552-32671.gif)
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