解题方法
1 . 已知
与
满足:
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4310db23fc79936c7182361e652bab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828dc8dc7259c510b6d63abf40f60e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6463882e7c149eff5f2de8fddd31b53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b508c4bac670bc1d9c7b3a40db59a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a51252db7ee33f653adf5233979c560.png)
A.![]() ![]() |
B.![]() ![]() |
C.两个三角形都是锐角三角形 |
D.两个三角形都是钝角三角形 |
您最近一年使用:0次
名校
2 . 化简结果:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc495da776baa199153a8796ab2f717.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc495da776baa199153a8796ab2f717.png)
您最近一年使用:0次