题目
题型:填空题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151828-14096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151828-38450.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151828-72794.png)
解析
试题分析:根据题意,由于
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151828-14096.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151828-38450.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151828-40447.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151828-72794.png)
点评:主要是考查了二倍角公式的运用,以及同角中商数关系的运用,属于中档题。
核心考点
试题【已知,则_______.】;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/20190822/20190822151742-38477.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151742-60657.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151742-37032.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151742-68044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151742-76626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151743-78480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151743-41605.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151730-59003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151730-95147.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151730-38112.png)
(2)请说出
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151730-38112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151731-13039.png)
(3)当
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151731-90857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151730-38112.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151731-68463.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151725-44263.png)
求函数
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151725-86592.png)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151725-38591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151725-16914.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151726-94664.png)
已知向量
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151622-26935.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151622-84310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151622-85918.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151623-16739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151623-89981.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151623-72844.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151623-40453.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151623-90036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151624-94044.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151624-88134.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151624-75084.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151624-64959.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151614-73678.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190822/20190822151614-37580.jpg)
A.![]() | B.![]() |
C.![]() | D.![]() |
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