题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093505-26776.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093505-78301.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093505-55873.png)
A.![]() |
B.![]() |
C.![]() |
D.2![]() |
答案
解析
设∠AFx=
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093506-97455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093506-97455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093506-53921.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093507-43669.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093507-28593.png)
∴3=2+3cos
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093506-97455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093507-55617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093506-97455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093507-10225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093506-97455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093506-63643.png)
又m=2+mcos(
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093508-98849.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093506-97455.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093507-55617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093508-63500.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093508-57323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093508-54231.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093458-15623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093459-83033.png)
A.![]() |
B.![]() |
C.1 |
D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093453-91153.png)
A.![]() |
B.4 |
C.![]() |
D.5 |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093446-85779.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093442-94962.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093442-28439.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093442-21535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093442-95273.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093442-28240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093432-92257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093432-97095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093432-90069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093432-64375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093432-61198.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191024/20191024093433-43473.png)
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