题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140142-33571.png)
(Ⅰ)求函数的最小正周期;
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140142-43257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-12910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-61769.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-12910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-50036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-12431.png)
解析
试题分析:(Ⅰ)求函数的最小正周期,由函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-50282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140142-43257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-12910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140144-11349.png)
试题解析:(Ⅰ)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140144-55455.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-12910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140144-75056.png)
(Ⅱ)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140142-43257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140144-31511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140144-88149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140143-12910.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140144-76171.png)
核心考点
试题【已知函数为常数).(Ⅰ)求函数的最小正周期;(Ⅱ)若时,的最小值为 ,求a的值.】;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/20190822/20190822140102-73707.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822140102-58168.png)
A.锐角三角形 | B.直角三角形 | C.等腰三角形 | D.钝角三角形 |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135917-25074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135917-58668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135917-26750.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135917-70374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135917-23992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135918-33717.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135824-29493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135744-29993.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135732-86868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135732-16743.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135732-34063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135733-19943.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135733-83481.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135733-21449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135733-99119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135733-20806.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135734-20154.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135734-19723.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135734-18667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822135733-99119.png)
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