题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192705-85494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192706-79408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192706-75960.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192707-87319.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192707-32169.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192707-68465.png)
解析
试题分析:由
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192708-76603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192705-85494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192708-58281.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192708-91163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192706-79408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192709-48235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192709-19250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192709-30833.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192709-30833.png)
试题解析:解:由
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192708-76603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192705-85494.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192708-58281.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192708-91163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192706-79408.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192709-48235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192709-76788.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192708-91163.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192708-76603.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192710-47138.png)
于是
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192710-50588.png)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921192707-68465.png)
核心考点
试题【已知,,且,,求角的值.】;主要考察你对两角和与差的三角函数等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184151-59745.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184022-82690.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184023-63906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184023-74756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184024-43434.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184024-58728.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184024-98671.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184024-64388.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184025-57008.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921184025-37825.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921183954-64485.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921183954-59920.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921183954-10381.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921183910-55036.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921183911-79259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921181850-14538.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921181850-56984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190921/20190921181850-52522.png)
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