名校
解题方法
1 . 记
的内角A,B,C的对边分期为a,b,c,已知点D在边AC上,且
,
.
(1)证明:
是等腰三角形
(2)若
,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01476dfb5970e27f54f742c27b9515f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448066668f6d1eed9bce63b1f486157f.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f450f5ce2ecf8e546d16edaaa9bdb80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e2f2d7147cf1699fbfdef9cf4af74.png)
您最近一年使用:0次
2023-12-17更新
|
477次组卷
|
3卷引用:山东省青岛市莱西市2024届高三上学期教学质量检测(一)数学试题