题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172917-80753.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172917-29109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172917-27443.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
由辅助角公式可得,
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172919-31861.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172919-47193.png)
因为
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172919-26280.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172919-67192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172919-85344.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172920-37632.png)
点评:此题考查三角函数化简及性质(单调性)的运用.
核心考点
试题【若,,,则( )A.B.C.D.】;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/20190822/20190822172912-33001.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172912-62970.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172913-58490.gif)
最小正周期是
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172913-15331.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172913-43348.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172913-29102.gif)
(本小题满分10分)
已知
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172907-15691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172908-92951.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172908-91999.gif)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172908-44217.gif)
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172838-13440.gif)
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172839-54005.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172839-37076.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172839-58194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172839-54572.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172839-75806.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172836-59624.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/20190822/20190822172747-98592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172747-68579.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172748-10965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172748-55668.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172748-87222.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172748-73165.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172749-12524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822172749-39255.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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