题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-90208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-49972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-58956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-16369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-70170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-90208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-49972.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050530-89103.png)
解析
试题分析:根据题意,由于
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-58956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-16369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050529-70170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050530-61431.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050530-89103.png)
点评:主要是考查了向量的数量积的运用,以及求解夹角问题,属于基础题。
核心考点
试题【若向量,满足,,且,则与的夹角为 .】;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/20191104/20191104050521-49836.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050521-48627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050521-91318.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050521-68053.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050513-25150.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050514-74472.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050514-88263.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050514-28814.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050514-95480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050515-87894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050515-70304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050515-26205.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050515-82401.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050516-83056.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050516-34604.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050508-15761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050509-26325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050509-90843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050509-20331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050509-81499.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050500-79271.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050500-93685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050500-30895.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050500-93462.png)
且最小正周期为
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050500-64414.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050501-72474.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050501-77952.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050501-74144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050501-76868.png)
(3)若
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050501-60148.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050452-99772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050452-65676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050452-75473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050452-99772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050452-65676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050452-99772.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050452-65676.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191104/20191104050452-99772.png)
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