1 . 已知
中三个内角
所对的边为
,且
.
(1)若
,求
的值;
(2)若
时,求
的周长.
![](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/826c47e363ac7484c30e6ee1ade5c7d5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f46bf4253fc5703d4f96898ebf07d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dcfa3e340b3976832d450dd4ae7e7a7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194ec92cdb9536b73028613ee7b50120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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解题方法
2 . 已知函数
,且
,将
的图象向右平移
个单位长度后,与函数
的图象相邻的三个交点依次为A,B,C,且
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee903d9a99406199879ceb299c6dd2c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01accbe13c9a1732359540103adb682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf9439dd1d624dedb50d781c511f080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e33b8da413a3b009e3b3a60db3117d25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5537c12fe7716aaba1a717f36b76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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名校
3 . 已知
的外接圆圆心为O,半径为2,
,且
,则
在
方向上的投影为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee1cdc6b1017df747fd5b381995e972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40d1195c26346944c5d6e5a992070cd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00490134f8caa9cc28910fb1aaff85e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99a1b3d5f4068fbcba6e4b47971d51a8.png)
A.-3 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-01-11更新
|
157次组卷
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2卷引用:广西百色市平果市铝城中学2023-2024学年高一下学期4月月考测试数学试卷