题目
题型:不详难度:来源:
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032711-67654.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032711-76368.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032711-20292.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032712-96735.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032712-87526.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032711-67654.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032711-20292.gif)
(Ⅰ)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032712-42290.gif)
(Ⅱ)如果△ABC的三边a、b、c满足
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032712-80358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-12656.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-12656.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032712-42290.gif)
答案
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-27635.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-91850.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-93691.gif)
解析
解:
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-48021.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
令
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-29869.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-18418.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
故函数
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032712-42290.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-27635.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032715-40808.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032715-24727.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032715-36872.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032715-70019.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032712-42290.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-93691.gif)
综上所述,
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-91850.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032713-93691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032714-20325.gif)
核心考点
试题【(本题满分12分)已知向量,函数·, (Ⅰ)求函数的单调递增区间; (Ⅱ)如果△ABC的三边a、b、c满足,且边b所对的角为,试求的范围及函数的值域. 】;主要考察你对正弦函数的图象与性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032632-71352.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032633-25353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032633-44350.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032633-39728.png)
A.192 | B.182 | C.-192 | D.-182 |
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032614-98263.gif)
(Ⅰ)若点
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032615-35791.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032615-78885.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032615-22034.gif)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032615-33099.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032616-26355.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032608-67399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032608-54589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032608-63565.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032608-76871.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032608-76871.png)
A.向右平移![]() | B.向左平移![]() |
C.向右平移![]() | D.向左平移![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032604-30784.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190914/20190914032558-89018.gif)
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