名校
解题方法
1 . 如图,在三棱柱
中,
为等边三角形,面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/26/2e70de61-6b30-4ff3-bb11-794d76ab5d89.png?resizew=164)
(1)若三棱柱
的体积为
,求点C到平面
的距离;
(2)若
且
面
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce1de41fb9bd93a1f40ead5995f346e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/26/2e70de61-6b30-4ff3-bb11-794d76ab5d89.png?resizew=164)
(1)若三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4275ea611d9faf99ec611cd2a5edc19d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89195bacd53d43195e70c12b5cfa041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72af0d595ebfc2d91225fbacafb02e6.png)
您最近一年使用:0次
2022-06-24更新
|
621次组卷
|
4卷引用:江苏省南京市江宁区2021-2022学年高二下学期期末数学试题
名校
2 . 已知空间中三点A(0,1,0),B(1,2,0),C(-1,3,1),则正确的有( )
A.![]() ![]() |
B.平面ABC的一个法向量是(1,-1,3) |
C.![]() ![]() ![]() |
D.与![]() |
您最近一年使用:0次
2022-06-24更新
|
1010次组卷
|
8卷引用:江苏省连云港市灌南县2021-2022学年高二下学期期中数学试题
名校
3 . 如图,斜三棱柱
中,
为正三角形,
为棱
的中点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/9731f837-edba-42ab-9de0-41065f492d84.png?resizew=194)
(1)证明:
平面
;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4890e58791814622b87c4d60ea971f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/9731f837-edba-42ab-9de0-41065f492d84.png?resizew=194)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3f9e8e58175cc46453515621e69193.png)
您最近一年使用:0次
2022-06-22更新
|
726次组卷
|
4卷引用:江苏省南京市六校联合体2021-2022学年高二下学期期末数学试题
名校
解题方法
4 . 如图1,已知等边
的边长为3,点M,N分别是边
,
上的点,且满足
,
,如图2,将
沿
折起到
的位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/8fd9e9ec-a873-496e-a70a-f8236db69947.png?resizew=384)
(1)求证:平面
平面
;
(2)若
,求平面
和平面
的夹角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5bc022be2b5d46d50d1f4ca404f58a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f82f2052ae213425f4b7fe86fe36da7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e7040c2fd8a163d71e35805775feb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/8fd9e9ec-a873-496e-a70a-f8236db69947.png?resizew=384)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/009635f987c7ae921b590545fda49519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af6b531f532eb39c26d36e9dd97254d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328105e90123956fed1b2e0731614a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719103f93166bab4828257608e641a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea4670e0e061a255af3621d30855011.png)
您最近一年使用:0次
2022-06-19更新
|
457次组卷
|
3卷引用:江苏省南师附中、淮阴中学、天一中学、海门中学2021-2022学年高二下学期期末联考数学试题
名校
5 . 如图,在直角梯形
中,
为
的中点,沿
将
折起,使得点
到点
的位置,且
为
的中点,
为边
上的动点(与点
不重合).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/9ae6da3f-1151-49b9-b23e-78e994ae1bdf.png?resizew=477)
(1)证明:平面
平面
;
(2)已知二面角
的余弦值为
,试确定
点位置,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e732625c891a2f178d99938853d492b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966bd22de4d115ed1c0c86c377696814.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/22/9ae6da3f-1151-49b9-b23e-78e994ae1bdf.png?resizew=477)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dec9c5d7af1c18018bce59adcd761e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)已知二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1bc8a077869e1b8405a4f1b0622ab95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1145c162038df3c7184d9201c628e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
您最近一年使用:0次
2022-06-18更新
|
450次组卷
|
3卷引用: 江苏省南京市金陵中学2021-2022学年高二下学期6月适应性考试数学试题
解题方法
6 . 如图,四棱锥
的底面为直角梯形,
∥
,
,
,
,
平面
.
![](https://img.xkw.com/dksih/QBM/2022/6/12/2999596513157120/2999992617058304/STEM/edbb1f29bcfd47478fd87e712aca3e63.png?resizew=169)
(1)求异面直线
与
所成的角的余弦值;
(2)求出点A在平面
上的投影M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/609cbf9151b4a3eaa609111d67def4f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/6/12/2999596513157120/2999992617058304/STEM/edbb1f29bcfd47478fd87e712aca3e63.png?resizew=169)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
(2)求出点A在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
7 . 如图,三棱柱
中侧棱与底面垂直,且
,
,
,M,N,P,D分别为
,BC,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/83254c6e-4fd1-49a1-84d0-f549b8705b78.png?resizew=220)
(1)求证:
面
;
(2)求平面PMN与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/83254c6e-4fd1-49a1-84d0-f549b8705b78.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc027de6ca8c118ed6ccd52eae99a821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求平面PMN与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
您最近一年使用:0次
2022-06-05更新
|
1845次组卷
|
6卷引用:江苏省镇江第一中学2021-2022学年高二下学期期末数学试题
江苏省镇江第一中学2021-2022学年高二下学期期末数学试题四川省成都市蓉城高中教育联盟2021-2022学年高二下学期期中考试理科数学试题河北省石家庄市第二中学2022届高三下学期高考考前模拟数学试题(已下线)2022年全国新高考II卷数学试题变式题13-16题(已下线)2022年全国新高考II卷数学试题变式题20-22题辽宁省沈阳市东北育才学校科学高中部2021-2022学年高三下学期最后一次模拟数学试题
名校
解题方法
8 . 如图,已知四棱台
的底面是矩形,平面
平面
,
,
为
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/2c9aa166-6e4b-4acd-b85e-204cc8b7605a.png?resizew=212)
(1)证明:平面
平面
;
(2)若
,
,求二面角
的余弦值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384ffa4e596b6c7b8e270217a47f7227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79fabd3d3f1852d36460faf4ce3cb39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a54c1cbc01b063553469d7130a4b243e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/2c9aa166-6e4b-4acd-b85e-204cc8b7605a.png?resizew=212)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84906b1f3675e696c9679463e6e79271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d01e3a09bce380379426636aa55081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c6965754006b202df71da1b51dd08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54305d2291b852672d933d5c91291209.png)
您最近一年使用:0次
2022-06-03更新
|
613次组卷
|
5卷引用:江苏省扬州中学2021-2022学年高二下学期6月月考数学试题
江苏省扬州中学2021-2022学年高二下学期6月月考数学试题(已下线)1.2.4 二面角云南省师范大学附属中学2022届高三下学期高考适应性月考卷(十)数学(理)试题(已下线)云南师范大学附属中学2022届高三高考适应性月考卷(十一)数学(理)试题广东省仲元中学2022-2023学年高二下学期五月月考数学试题
名校
解题方法
9 . 如图,四棱锥
中,侧面
为等边三角形且垂直于底面
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/29/2989841092280320/2992542634934272/STEM/91e23eff-7239-440f-b6ce-085bf023b08e.png?resizew=185)
(1)求
到平面
的距离;
(2)点
在棱
上,且直线
与底面
所成角为
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4299cca48ff6abfb252ef73b5e62317d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83b76a280fc562446ee8ddd2d6bf1d4.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/2022/5/29/2989841092280320/2992542634934272/STEM/91e23eff-7239-440f-b6ce-085bf023b08e.png?resizew=185)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96fe44cb45b52ade75574ed31d05fb26.png)
您最近一年使用:0次
2022-06-02更新
|
390次组卷
|
3卷引用:江苏省宿迁市“丹靖沭”三校2021-2022学年高二(普通班)下学期5月联考数学试题
名校
解题方法
10 . 正方体
棱长为2,
是棱
的中点,
是四边形
内一点(包含边界),且
,当三棱锥
的体积最大时,
与平面
所成角的正弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7253ffd3fc633d861810ee2e872188b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99a635f1bc7f5a47690eb8e1d556d55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d01355a3443f2620b5f793cb14a7a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-06-02更新
|
1283次组卷
|
10卷引用:江苏省宿迁市“丹靖沭”三校2021-2022学年高二(普通班)下学期5月联考数学试题
江苏省宿迁市“丹靖沭”三校2021-2022学年高二(普通班)下学期5月联考数学试题山东省聊城市第二中学2022-2023学年高二上学期第一次月考数学试题山东省聊城颐中外国语学校2022-2023学年高二上学期第一次月考数学试题江苏省连云港高级中学2022-2023学年高二下学期第一次学情检测数学试题(已下线)第一章 空间向量与立体几何综合测试-2022年暑假高一升高二数学衔接知识自学讲义(人教A版2019)河南省濮阳市2023-2024学年高二上学期9月大联考数学试题陕西省西安市长安区2023-2024学年高二上学期10月月考数学试题山东省聊城市临清市实验高级中学2023-2024学年高二上学期第一次月考(9月)数学试题贵州省都匀兴华中学2023-2024学年高二上学期阶段测试(一)数学试题(已下线)第06讲 向量法求空间角(含探索性问题) (练)