解题方法
1 . 在三棱锥
中,
平面
,
是
上一点,且
,连接
与
,
为
中点.
点的平面平行于平面
且与
交于点
,求
;
(2)若平面
平面
,且
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1848a0579202dc81aa65609ad60a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b0b858bc8fe8b2737b2febc1b3ce56.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c83e3ba152215dcda525eebab11e70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6760f565c694d1cdb6d7068e14526d00.png)
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名校
解题方法
2 . 在
中,
为
的中点,点
在线段
上,且
,将
以直线
为轴顺时针转一周围成一个圆锥,
为底面圆上一点,满足
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad321498d5dbccc103e27859cfcad347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/facc34ca1966664602c12de6152fa8e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d1735ec51fb10d3dfa0b8175fd126.png)
A.![]() |
B.![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
2024-04-07更新
|
1049次组卷
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4卷引用:贵州省安顺市部分学校2024届高三下学期二模考试数学试题
3 . 以下四个命题为真命题的是( )
A.已知![]() ![]() ![]() ![]() ![]() ![]() |
B.若直线![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.等比数列![]() ![]() ![]() ![]() |
D.若圆![]() ![]() ![]() ![]() ![]() ![]() |
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解题方法
4 . 如图点
分别是棱长为2的正方体
六个面的中心,以
为顶点的多面体记为八面体
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e7a32810fcb9158bfe72d69515c7b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e7a32810fcb9158bfe72d69515c7b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/25/00de4502-94a6-4108-9ac1-349ae88cc245.png?resizew=162)
A.四点![]() | B.八面体![]() ![]() |
C.八面体![]() ![]() | D.直线![]() ![]() ![]() |
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解题方法
5 . 如图三棱锥
中
,点
为边
中点,点
为线段
上的动点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/15eef04c-3e45-4326-85f4-6a2ba7506571.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b4c1ae9c57d51e27bbdb001122d3bd.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/15eef04c-3e45-4326-85f4-6a2ba7506571.png?resizew=186)
A.存在实数![]() ![]() |
B.当![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.当![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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4卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题
解题方法
6 . 定义:与两条异面直线都垂直相交的直线叫做这两条异面直线的公垂线,公垂线被这两条异面直线截取的线段,叫做这两条异面直线的公垂线段,两条异面直线的公垂线段的长度,叫做这两条异面直线的距离,公垂线段的长度可以看作是:分别连接两异面直线上两点,所得连线的向量在公垂线的方向向量上的投影向量的长度.如图,正方体
的棱长为
是异面直线
与
的公垂线段,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a065f49cfc09f5969865f056fd9beac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/bebbd5bd-95db-453a-b4dd-cfec8abcb6f9.png?resizew=160)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
7 . 下列命题正确的是( )
A.已知![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
B.若直线![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.已知直线![]() ![]() ![]() ![]() ![]() ![]() |
D.已知平面![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-10-19更新
|
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|
2卷引用:贵州省“三新“”改革联盟2023-2024学年高二上学期第一次联考数学试题
名校
8 . 如图,已知圆柱的轴截面
为正方形,
,
为圆弧
上的两个三等分点,
,
为母线,
,
分别为线段
,
上的动点(与端点不重合),经过
,
,
的平面
与线段
交于点
.
(1)证明:
;
(2)当
时,求平面
与圆柱底面
所成夹角的正弦值的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/24/a3435286-b6cd-4341-9e3a-51c680ec7bd2.png?resizew=119)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ce395d0a14f53004b815c5304afb4f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9398ffc304dcefeda7a865cf557f702f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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2卷引用:贵州省黔西南州部分学校2024届高三上学期9月高考适应性月考(一)数学试题
解题方法
9 . 钟鼓楼是中国传统建筑之一,属于钟楼和鼓楼的合称,是主要用于报时的建筑.中国古代一般建于城市的中心地带,在现代城市中,也可以常常看见附有钟楼的建筑.如图,在某市一建筑物楼顶有一顶部逐级收拢的四面钟楼,四个大钟对称分布在四棱柱的四个侧面(四棱柱看成正四棱柱,钟面圆心在棱柱侧面中心上),在整点时刻(在0点至12点中取整数点,含0点,不含12点),已知在3点时和9点时,相邻两钟面上的时针所在的两条直线相互垂直,则在2点时和8点时,相邻两钟面上的时针所在的两条直线所成的角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/71c4a5e6-672d-4bde-8be6-2303f9034dd4.png?resizew=160)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-08-03更新
|
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7卷引用:贵州省威宁彝族回族苗族自治县第八中学2023届高三数学(理)样卷(一)试题
贵州省威宁彝族回族苗族自治县第八中学2023届高三数学(理)样卷(一)试题(已下线)第一章 空间向量与立体几何(单元测试)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第一册)(已下线)模块四 专题8 高考新题型(复杂情景题专训)基础夯实练(人教A)(已下线)1.4.2 用空间向量研究距离、夹角问题【第三练】(已下线)第05讲 空间向量及其应用(练习)(已下线)模块一 专题1 《立体几何》单元检测篇 B提升卷(已下线)第03讲 第一章空间向量与立体几何章节综合测试(原卷版)
名校
解题方法
10 . 古希腊数学家阿波罗尼斯采用平面切割圆锥面的方法来研究圆锥曲线,如图1,设圆锥轴截面的顶角为
,用一个平面
去截该圆锥面,随着圆锥的轴和
所成角
的变化,截得的曲线的形状也不同.据研究,曲线的离心率为
,比如,当
时,
,此时截得的曲线是抛物线.如图2,在底面半径为
,高为
的圆锥
中,
、
是底面圆
上互相垂直的直径,
是母线
上一点,
,平面
截该圆锥面所得的曲线的离心率为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/011f64b8-0f83-457b-8f87-5174f47d8bce.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/1441e670-fcd8-48fb-a66c-daa471c37e98.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8dd0c52aca1675c17b9a019aa7901e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e55f4e5a5d84670bbf3de150da74b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa3205b1df826d63914dcb55bb3ab43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dbcaa127022fbd6b6f13345196408a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3358e5017bb8701143245ad5a1568219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/011f64b8-0f83-457b-8f87-5174f47d8bce.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/1441e670-fcd8-48fb-a66c-daa471c37e98.png?resizew=176)
A.![]() | B.![]() | C.![]() | D.![]() |
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2023-05-06更新
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5卷引用:贵州省贵阳市2023届高三适应性考试(二)数学(理)试题