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解题方法
1 . 已知函数
的部分图象如图1所示,
、
分别为图象的最高点和最低点,过
作
轴的垂线,交
轴于
,点
为该部分图象与
轴的交点.将绘有该图象的纸片沿
轴折成直二面角,如图2所示,此时
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
______ .
①
;
②图2中,
;
③图2中,过线段
的中点且与
垂直的平面与
轴交于点
;
④图2中,
是
及其内部的点构成的集合.设集合
,则
表示的区域的面积大于
.
其中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3502cd5c18938713a23568f4376f529a.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d363758a1cc53a47db20561e40638692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d696a13ce341d37e0718952360e70a7.png)
②图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258974db8fea723fee4c44d5765948e5.png)
③图2中,过线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
④图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2df93bd15f25096c510b589aad0dfc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca68f5844774382023d1cdcadef46038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
其中所有正确结论的序号是
您最近一年使用:0次
2023-03-27更新
|
2175次组卷
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12卷引用:北京市东城区2023届高三一模数学试题
北京市东城区2023届高三一模数学试题专题12压轴题汇总(10、15、21题)专题03三角函数与解三角形专题08空间向量与立体几何(已下线)模块七 第6套 迎接高考之必做基础热身题( 概率与立几)北京卷专题06三角函数(填空题)北京工业大学附属中学2022-2023学年高一下学期期中考试数学试题北京市海淀区首都师范大学附属中学2024届高三上学期10月阶段检测数学试题新疆乌鲁木齐市第一中学2024届高三上学期第二次月考数学试题(已下线)空间向量与立体几何北京高一专题09立体几何(已下线)第8题 由空间距离求夹角(压轴小题)
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2 . 用一张A4纸围绕半径为rcm的石膏圆柱体包裹若干圈,然后用裁纸刀将圆柱体切为两段,如图①所示.设圆柱体母线与截面的夹角为
(0°<
<90°),如图②.将其中一段圆柱体外包裹的A4纸展开铺平,如果忽略纸的厚度造成的误差,我们会发现剪裁边缘形成的曲线是正弦型曲线,如图③.建立适当的坐标系后,这条曲线的解析式可设为
,若f(x)的最小正周期为
,则r=________ cm,此时,当
=________ 时,可使f(x)的值域为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2067fa076948c7761fd2fb9379af0c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090eddc0607f90b2f66576b9e607fc2a.png)
![](https://img.xkw.com/dksih/QBM/2021/7/5/2757823182479360/2779884305358848/STEM/1708f049b18f47698ee5fcd7c520e717.png?resizew=405)
您最近一年使用:0次
2021-08-05更新
|
374次组卷
|
2卷引用:北京市东城区2020-2021学年高一下学期期末数学试题