题目
题型:不详难度:来源:
A.0<B≤![]() | B.0<B≤![]() |
C.0<B≤![]() | D.![]() |
答案
解析
所以cosB=
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115746-81312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115746-83436.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115746-75633.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115747-40118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115747-70384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115747-19631.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115747-70384.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115747-81821.png)
因为cosB在
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115748-25868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115745-82118.png)
核心考点
试题【在△ABC中,A,B,C分别为a,b,c所对的角,且a,b,c成等差数列,则B满足的条件是 ( )A.0<B≤B.0<B≤C.0<B≤D.&】;主要考察你对不等式的概念与性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115737-32379.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115725-46761.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115725-31451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115726-14406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115710-46380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115711-64875.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115711-64875.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115711-66739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115711-40819.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115704-80601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115705-90305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115705-90305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115704-80601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115658-67737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115658-95694.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015115658-36124.png)
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