1 . 自古以来,斗笠是一个防晒遮雨的用具,是家喻户晓的生活必需品之一,主要用竹篾和一种叫做棕榈叶染白后编织而成,已列入世界非物质文化遗产名录.现测量如图中一顶斗笠,得到图中圆锥
模型,经测量底面圆
的直径
,母线
,若点
在
上,且
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/1/7a2dbbf1-3a38-4a6d-87a7-f1087f1c6cf7.png?resizew=246)
(1)证明:
平面
;
(2)求直线
和平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd20754e7a429dfa1e87eeff0907e6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0edce4f127d8f2da994e2ea78e4dee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1721f5eb9a589d1185a3d1dd225f6a11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2022/6/28/3011148409806848/3012440204394496/STEM/0da52f64d14645c7973f32be7d69a9e4.png?resizew=189)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/1/7a2dbbf1-3a38-4a6d-87a7-f1087f1c6cf7.png?resizew=246)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002cc6a0373255f39172cdee62fb6b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15b63176f43bc7a0654d0f6f45e7429.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15b63176f43bc7a0654d0f6f45e7429.png)
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2 . 将
的图象上各点的横坐标缩短为原来的
,纵坐标不变,再将图象上各点向左平移
个单位长度,则所得的图象的函数解析式是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c487fec20bd809e0baf5cb39afe8979.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 五月五,是端午,门插艾,香满堂,吃粽子,蘸白糖,粽子古称“角黍”,是我国南北各地的节令食品,因各地风俗不同,粽子的形状和食材也会不同,有一种各面都是正三角形的正四面体形粽子,若该正四面体粽子的棱长为
,则现有
体积的食材,最多可以包成这种粽子________ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158b8cde63cec81f6e2987858b27f516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc7e6709d1b3a0547ab241f9bbd75a5.png)
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4 . 在①
,②
这两个条件中任选一个,补充到下面的横线中,并求解.
在
中,角
,
,
所对的边分别是
,
,
,且
,
,若________.
(注:只需选一个作答,如果选择两个条件分别解答,按第一个解答给分)求:
(1)
的值;
(2)
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941a2c75cf77ab4ee236c02798acad9f.png)
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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a3ee883d82bea8e114bcaf6ee2b8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ab1c19b66cda3fb899f06d9a25e973c.png)
(注:只需选一个作答,如果选择两个条件分别解答,按第一个解答给分)求:
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2022-06-30更新
|
420次组卷
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2卷引用:江西省赣州市2021-2022学年高一下学期期末考数学试题
5 . 已知函数
,
.
(1)求函数
的单调递增区间;
(2)设
,关于
的函数
在区间
上的最小值为
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4d76806a6eac8d7c089a80a845549d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbeb27d19430ee39498c0d9b9dc5278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f51f8dea12d1325fd657eb9875823b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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名校
6 . 在3世纪中期,我国古代数学家刘徽在《九章算术注》中提出了割圆术:“割之弥细,所失弥少,割之又割,以至于不可割,则与圆合体,而无所失矣”这可视为中国古代极限观念的佳作.割圆术可以视为将一个圆内接正
边形等分成
个等腰三角形(如图所示),当
越大,等腰三角形的面积之和越近似等于圆的面积.运用割圆术的思想,可得到
的近似值为(
取近似值3.14)( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ce384e4405b21b83d36d7b1315eb72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
A.0.039 | B.0.157 | C.0.314 | D.0.079 |
您最近一年使用:0次
2022-06-30更新
|
486次组卷
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2卷引用:江西省赣州市2021-2022学年高一下学期期末考数学试题
解题方法
7 . 已知复数
(
为虚数单位),则其共轭复数
在复平面内对应的点位于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9574f7da23406f66f07c3a804c059adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579743813856e2a9183f5ec6eaaefbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fcfebd9f5a57036e6df6b6e14865da3.png)
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
您最近一年使用:0次
解题方法
8 .
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86cedc574f98853f913129eae1e1e03e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
9 . 已知
和点
满足
,若存在实数
、
使得
成立,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e486a69c94a6442bb2131452fd88996f.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f6fb042f22ad91616b9f85fd39a8e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97309ee5f562845b1855e8c0fcd0d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e486a69c94a6442bb2131452fd88996f.png)
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10 . 正方形
的边长为
,它是水平放置的一个平面图形的直观图,则原平面图形的面积是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28de00884c0ddaba49a2b050731a2bfa.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-06-30更新
|
410次组卷
|
3卷引用:江西省赣州市2021-2022学年高一下学期期末考数学试题