题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152220-25661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152220-64108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152221-62975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152221-67324.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152221-66490.png)
(2)求满足
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152221-90445.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-97047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-93455.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-95036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-83742.png)
解析
试题分析:(1)因为,函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152220-25661.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152220-64108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152221-62975.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-33471.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152223-14880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152221-67324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152223-80832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152223-77198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152223-68279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-95036.png)
(2)由(1)得,
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-95036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152223-46348.png)
即,
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152223-65835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-97047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-93455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152222-83742.png)
点评:典型题,根据函数图象特征确定函数的解析式,一般地,先确定A,T,通过代人计算确定
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152224-84505.png)
核心考点
试题【已知函数的最小正周期为,最小值为,图像过点(1)求的解析式(2)求满足且的的集合 。】;主要考察你对任意角三角函数的概念等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152215-76842.png)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152215-25446.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152215-25446.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152216-85281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822152216-94462.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151948-29443.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151948-37830.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151948-84006.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151948-44976.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151922-51845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151922-51279.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151858-96202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151859-11322.png)
(Ⅰ)当
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151859-43227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151859-74075.png)
(Ⅱ)在
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151859-12327.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151859-16067.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151900-65322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151900-67272.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151853-95907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151853-38346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151854-28585.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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