1 . 如图,矩形
中,
,点
分别在线段
(含端点)上,
为
的中点,
,设
.
![](https://img.xkw.com/dksih/QBM/2023/2/19/3178034210947072/3179742576812032/STEM/14be9dd6f33940a0862900505caa546c.png?resizew=176)
(1)求角
的取值范围;
(2)求出
的周长
关于角
的函数解析式
,并求
的周长
的最小值及此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f60113a7e896db70bbaf361521d3bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3835e6398d18d162afebc92cd2ae9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff04d6bd71917563cbd1f967d50465cc.png)
![](https://img.xkw.com/dksih/QBM/2023/2/19/3178034210947072/3179742576812032/STEM/14be9dd6f33940a0862900505caa546c.png?resizew=176)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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2023-02-21更新
|
1209次组卷
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4卷引用:安徽省宣城市2022-2023学年高一上学期期末数学试题
安徽省宣城市2022-2023学年高一上学期期末数学试题江苏省南京外国语学校2022-2023学年高一下学期第一次月考数学试题四川省绵阳南山中学2022-2023学年高一下学期期中考试数学试题(已下线)专题05 三角函数4-2024年高一数学寒假作业单元合订本
2 . 已知
中,
为
的中点,
,
,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3274aac77f61dc25ab33cf0351b3810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc327192b90460f8845ef81229422784.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cf3d14eb32760482c383221784ee3f3.png)
您最近一年使用:0次