题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030157-34946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030157-74691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030157-35296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030158-13609.jpg)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030159-85589.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030159-48250.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030159-68341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030159-59343.png)
【考点定位】解三角形.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030152-99321.png)
(1)求角B的大小;
(2)若a+c=1,求b的取值范围
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030143-46878.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030143-87215.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-49626.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-34582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-34648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-94412.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-64869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-75837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-26946.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-68033.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030145-16316.png)
(1)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-49626.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-82595.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030146-56950.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030144-34582.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030135-13042.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030135-55053.png)
(1)求角A与角B的大小;
(2)若BC边上的中线AM的长为
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030135-88413.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030130-71489.png)
A.等边三角形 | B.直角三角形 | C.钝角三角形 | D.锐角三角形 |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030123-86507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-95146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-21811.png)
①若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-86515.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-87485.png)
②若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-35916.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030123-86507.png)
③必存在
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-95146.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-50587.png)
④若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030124-96973.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020030123-86507.png)
其中,结论正确的编号为 (写出所有正确结论的编号).
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