1 . 在①
;②
;③
.
这三个条件中任选一个,补充在下面的问题中,并解答问题:
在
中,内角
,
,
的对边分别为
,
,
,且满足条件______(填写所选条件的序号).
(1)求角
;
(2)若
的面积为
,
为
的中点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab54f4110ac6aa02511617862c5a64b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b639af9d5bba1e01f761bca1edc5942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13b5f652b386eee39aab79d1fb04465.png)
这三个条件中任选一个,补充在下面的问题中,并解答问题:
在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a554e03744b5befe9e0939377dafa8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次
2021-09-30更新
|
823次组卷
|
6卷引用:陕西省西安市2024届高三第一次质量检测文科数学试题
名校
解题方法
2 . 已知向量
,
,
.
(1)画出函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc95e3e09074909fbd7a72953967a28.png)
的图象;
(2)在△ABC中,BC=
,sin B=3sin C,若
,求△ABC的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b3fa2cd2b31a98ca521a15d6e8bda92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5fe0d00238e6f9ef62c7f02772465e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc95e3e09074909fbd7a72953967a28.png)
(1)画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdc95e3e09074909fbd7a72953967a28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f5e8f5f165d9a5cbcdcf5bfdaefb49.png)
(2)在△ABC中,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d3c28e2fc237e76e757b8a82c619802.png)
您最近一年使用:0次
2021-03-06更新
|
1018次组卷
|
2卷引用:陕西省西安中学2021届高三下学期第二次模拟考试数学(文)试题