已知a,b,c分别是
的内角A,B,C的对边,若
的周长为
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f676664eba899f4064cf6e545c34f8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d206bd5fef15dc3b7cd62d5c765879d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7277696e8d9f58c9ec28887783b317e8.png)
A.![]() | B.2 |
C.4 | D.![]() |
21-22高一·全国·课后作业 查看更多[3]
更新时间:2023-07-06 23:06:32
|
【知识点】 正弦定理边角互化的应用解读
相似题推荐
单选题
|
容易
(0.94)
【推荐1】在
中,角
的对边分别为
,若
,则cosB等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a199eb5476c2ffc33aa84ee5af25a41d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
容易
(0.94)
解题方法
【推荐2】在
中,角
的对边分别是
,已知
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29534bc9df0dc9c6fae311b440b2b9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9637ba0492e0e54b33cdab313c2fef76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
A.9 | B.6 | C.3 | D.18 |
您最近一年使用:0次