题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232403-76361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232403-62750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232403-84733.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-41080.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-24778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-41080.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-20811.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-82666.png)
解析
试题分析:对于此类问题,首先得做出函数的解析式,并且如果是三角函数最好能够化成
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-77236.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232405-57285.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232405-75903.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232405-65277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232405-81293.png)
故函数
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232406-83838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-20811.png)
(2)由
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-24778.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232406-14546.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232406-59249.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232406-83838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232404-82666.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232406-40780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232406-47475.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232407-26636.png)
核心考点
试题【已知向量向量记(1)求函数的单调递增区间;(2)若,求函数的值域.】;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/20190829/20190829232357-61504.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232357-52182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232358-82292.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232357-52182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232324-66114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232324-85017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232324-25549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232324-56916.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232325-26364.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232325-16843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232324-56916.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232321-19063.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232316-98527.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232316-74408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232317-46125.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232251-51881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232251-55696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190829/20190829232251-37595.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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