1 . 在正四面体
(各棱都相等)中,
是
的中点,则异面直线
与
所成的角的余弦值为__________ .
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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2 . 我国古代数学名著《九章算术》中记载的“刍甍”(Chumeng)是指底面为矩形,顶部只有一条棱的五面体.如图,五面体
是一个刍甍,其中
是正三角形,且
,
,则以下结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6830ebecddbd9759be626289c408e4f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5097a7d00f442a25551c4020e0d49ad6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62168f062a20929e2b382309dd0a7604.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/4b25123e-bcf6-4617-8421-c42016423ce1.png?resizew=200)
A.![]() |
B.直线![]() ![]() ![]() |
C.![]() ![]() ![]() |
D.五面体![]() ![]() |
您最近一年使用:0次
2023-07-21更新
|
250次组卷
|
2卷引用:福建省厦门第二中学2022-2023学年高二上学期第二次阶段考(12月)数学试题
解题方法
3 . 在直三棱柱
中,
,
,
,则异面直线
与
所成角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9d5815dc775d5a5810fff0b016a8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 如图,正方体
中,
,点
分别为棱
上的点(不与端点重合),且
.
(1)求证:
平面
;
(2)求三棱锥
的体积的最大值;
(3)点
在平面
内运动(含边界),当
时,求直线
与直线
所成角的余弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4f409aa1d8abb7fe8d781c3951de02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ff398bdaa4eb5a274f86c0d8b77ef2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/18/ab3b17d1-08e6-4c9b-80b0-a04b390da08a.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f36f074d1dc1054c679236ec70dcaf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6684d8fe0d6da7564247e47b948e3997.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8feaaff9d785ad501a6cdfbc0caacad4.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0036261c4ac6f9f8d30fd1d8a0e6e580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
您最近一年使用:0次
解题方法
5 . 正方体
中,
为底面
的中心,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
A.直线![]() ![]() ![]() |
B.直线![]() ![]() ![]() |
C.直线![]() ![]() |
D.直线![]() ![]() ![]() |
您最近一年使用:0次
6 . 已知三棱锥
,
,
是边长为2的正三角形,
为
中点.下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e9034e65ac025cd0af6695c12498c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
A.异面直线CE与AB所成角的余弦值为![]() |
B.直线CE与平面ABC所成角的正弦值为![]() |
C.二面角![]() ![]() |
D.三棱锥![]() ![]() |
您最近一年使用:0次
名校
7 . 如图1,矩形ABCD中,
,等腰梯形ADEF中,
,
.将梯形ADEF沿AD折起,得到如图2所示的多面体
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1391573c30964b87ca3429bf67ae22aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d354155f71a1736c1c9186168695edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b31e19fa5cf6d4d5f14f90e87d34ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebdfd1d8f2087da49df379f6330e4cc2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/26/888c35d5-14c5-4872-9f4e-426104a1957d.png?resizew=273)
A.异面直线![]() ![]() |
B.当二面角![]() ![]() ![]() |
C.存在某个位置,使得![]() ![]() |
D.点D到平面![]() ![]() ![]() |
您最近一年使用:0次
8 . 如图,正方体
的棱长为
,
是棱
上的动点(不包括端点),则下列说法正确的是( ).
![](https://img.xkw.com/dksih/QBM/2023/4/25/3223984469688320/3264457095766016/STEM/1c8274b02b25497681192bcc5479cc41.png?resizew=220)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/2023/4/25/3223984469688320/3264457095766016/STEM/1c8274b02b25497681192bcc5479cc41.png?resizew=220)
A.若![]() ![]() ![]() ![]() |
B.三棱锥![]() |
C.当![]() ![]() ![]() ![]() ![]() |
D.直线![]() ![]() |
您最近一年使用:0次
名校
9 . 已知等边三边形
的边长为4,
为
的中点,将
沿
折到
,使得
为等边三边形,则直线
与
所成的角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/b5f517953a21c2a45fd8465072c44bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaae2200917767407571ef4980c64afc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b32b0bbdc46391dab9533f08f2517a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.![]() | B.0 | C.![]() | D.![]() |
您最近一年使用:0次
2023-07-13更新
|
252次组卷
|
3卷引用:福建省龙岩市2022-2023学年高一下学期7月期末数学试题
福建省龙岩市2022-2023学年高一下学期7月期末数学试题福建省永春第一中学2023-2024学年高一上学期8月月考数学试题(已下线)专题突破:线线角、线面角、二面角的几何求法盘点-同步题型分类归纳讲与练(人教A版2019必修第二册)
名校
解题方法
10 . 如图,在三棱锥
中,
,
,
,
为
的中点.
平面
;
(2)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6559aabe16c2318687089e7cc498b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2023-07-11更新
|
450次组卷
|
4卷引用:福建省泉州市安溪第一中学2023-2024学年高一下学期6月份质量检测数学试题
福建省泉州市安溪第一中学2023-2024学年高一下学期6月份质量检测数学试题山东省枣庄市2022-2023学年高一下学期期末数学试题广东省鹤山市第一中学2023-2024学年高二上学期第一阶段考数学试题(已下线)第二章 立体几何中的计算 专题一 空间角 微点1 异面直线所成角(一)【培优版】