题目
题型:不详难度:来源:
(本小题满分12分)
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175833-21853.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175834-16819.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175834-35140.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175834-99492.gif)
(Ⅰ)求角C的大小;
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175835-66498.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175835-50126.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175835-40434.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175835-52051.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175836-39201.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175836-87643.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175836-41181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175836-85818.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175836-36546.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175837-83415.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175837-52892.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175837-75228.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175837-78095.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175838-22017.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175838-59773.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175838-84414.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175838-32293.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175839-74733.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175839-66810.gif)
解析
核心考点
试题【(本小题满分12分)已知向量="(sinA" ,sinB),=(cosB,cosA),且A、B、C分别为△ABC的三边所对的角。(Ⅰ)求角C的大小;(Ⅱ)若,求】;主要考察你对正弦定理等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175742-36387.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175742-18791.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175742-55118.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175719-23323.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175720-38337.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175720-77104.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175720-58987.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175646-94641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175646-91374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175646-14504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175646-73461.png)
A.30° | B.45° | C.135° | D.45°或135° |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-14704.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-77186.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-96670.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-14704.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175638-73871.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175639-33297.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175639-30553.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175639-24267.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175639-36420.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175640-73795.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175633-70053.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019175633-36855.gif)
A.![]() | B.![]() ![]() ![]() | C.![]() | D.![]() |
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