2011·贵州·模拟预测
解题方法
1 . 设
的内角A、B、C所对的边分别为a,b,c,且
.
(1)求角A的大小;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b1182c4fbfbe44f693a823c70ad415.png)
(1)求角A的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2bcb0cf5182f70cf5f2737b709b4a9c.png)
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2 . 在
中,角
所对的边分别为
,且满足
.
(1)求角
;
(2)若
,且
,求边
.
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549662720/STEM/a6aa83a4022e49f1886babf66b1e7cd4.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549662720/STEM/1f5d25853b02479ca92ee559972cc469.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549662720/STEM/b38a376032bc46ee978e1452c1d23a49.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549662720/STEM/1614f88abaf74e26bb8358f3be1bb702.png)
(1)求角
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549662720/STEM/98bf11e8c4924ead9c71a6a4be8ca9b3.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549662720/STEM/90b6e50b968a4bf7abbffdc9b1a40b9d.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549662720/STEM/5febf6d04c9d464fab89c3dfbfd5d186.png)
![](https://img.xkw.com/dksih/QBM/2016/3/7/1572520543559680/1572520549662720/STEM/5e043e6954f845f882f9fe70ad8da2ac.png)
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