1 . 如图,在直三棱柱
中,
,且
,
,
,
是棱
的中点,
是棱
上的点,满足
.
![](https://img.xkw.com/dksih/QBM/2022/7/19/3025835179589632/3026888124522496/STEM/7a892ba0c1dc4292b7d5202c2dcff261.png?resizew=145)
(1)证明:
平面
;
(2)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/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e240a6378adf6d23ebf9cc710c9bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022365ed188bd800e0b8a2b4ec1e2303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6c5282bc1ea20767a6c092c22c761ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e840e386b2870205de3c7a21f97668e4.png)
![](https://img.xkw.com/dksih/QBM/2022/7/19/3025835179589632/3026888124522496/STEM/7a892ba0c1dc4292b7d5202c2dcff261.png?resizew=145)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd06851d747f8ccf046bc807b2523e65.png)
您最近一年使用:0次
名校
2 . 《九章算术》中,将四个面都为直角三角形的四面体称为鳖臑.如图,已知PA⊥平面ABC,平面PAB⊥平面PBC.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/38d44498-03e0-428d-b0b4-75a07f5649e9.png?resizew=144)
(1)判断四面体P-ABC是否为鳖臑,并给出证明;
(2)若二面角B-AP-C与二面角A-BC-P的大小都是
,求AC与平面BCP所成角的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/38d44498-03e0-428d-b0b4-75a07f5649e9.png?resizew=144)
(1)判断四面体P-ABC是否为鳖臑,并给出证明;
(2)若二面角B-AP-C与二面角A-BC-P的大小都是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
您最近一年使用:0次
2022-07-02更新
|
1162次组卷
|
2卷引用:辽宁省沈阳市第一二〇中学2021-2022学年高一下学期期末数学试题
名校
解题方法
3 . 如图,在三棱柱
中,底面
是边长为2的正三角形,侧面
是菱形,平面
平面
,
,
分别是棱
,
的中点,
是棱
上一点,且
.
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961308301631488/2963616140009472/STEM/d5b7d634-b7f1-4a72-a88b-27cd41d15368.png?resizew=230)
(1)证明:
平面
;
(2)从①三棱锥
的体积为1;②
与底面
所成的角为60°;③异面直线
与
所成的角为30°这三个条件中选择-一个作为已知,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45963da68f1b237d5275e506f071eff.png)
![](https://img.xkw.com/dksih/QBM/2022/4/19/2961308301631488/2963616140009472/STEM/d5b7d634-b7f1-4a72-a88b-27cd41d15368.png?resizew=230)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a407b262c22419f73396170ecdc849.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)从①三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d61d2b7b16e12fd97f870fb3fa522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aae4c7c4bdc8eb84c1cd3a8c5a40701.png)
您最近一年使用:0次
2022-04-22更新
|
887次组卷
|
6卷引用:辽宁省本溪市本溪县高级中学2022-2023学年高二上学期第一次月考数学试题
辽宁省本溪市本溪县高级中学2022-2023学年高二上学期第一次月考数学试题江苏省南京师范大学附属中学2021-2022学年高二下学期期中数学试题四川省成都市树德中学2022届高三下学期高考适应性考试数学(理科)试题空间向量与立体几何中的高考新题型(已下线)北京市海淀区2023届高三上学期期末练习数学试题变式题16-21(已下线)专题4 大题分类练(空间向量与立体几何)拔高能力练 高二期末
名校
4 . 如图,在三棱锥
中,
,
,
,点O是AC的中点,点P在线段MC上,
![](https://img.xkw.com/dksih/QBM/2022/3/21/2941122068856832/2941970325708800/STEM/d02ee6ed-8ac3-4396-b1e7-06812695d5de.png?resizew=155)
(1)证明:
平面ABC;
(2)若
,直线AP与平面ABC所成的角为
,求二面角
的余弦值的大小
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d90f940f5693b22ddf2e7c761887d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d6c8b46d3bac1335cfff31616f5748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d11a5a756d8fdd7b294c4f5fd63467b.png)
![](https://img.xkw.com/dksih/QBM/2022/3/21/2941122068856832/2941970325708800/STEM/d02ee6ed-8ac3-4396-b1e7-06812695d5de.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab8a2ca644d9d7cdb4784a4fd28d3904.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9751ea1d1d9447230ac4d47839c138b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
您最近一年使用:0次
2022-03-22更新
|
1401次组卷
|
4卷引用:辽宁省协作体2022届高三第一次模拟考试数学试题
辽宁省协作体2022届高三第一次模拟考试数学试题重庆市育才中学2022届高三二诊模拟(二)数学试题(已下线)考点09 解三角形-1-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)2023届普通高等学校招生全国统一考试数学押题卷(一)
解题方法
5 . 如图,在四棱锥
中,平面
平面ABCD,底面ABCD是矩形,
,
,直线PA与CD所成角为60°.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/f22071a2-610f-4c9e-9520-19c4214f082a.png?resizew=171)
(1)求直线PD与平面ABCD所成角的正弦值;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9b8e7befcb7881c294070175b1a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/f22071a2-610f-4c9e-9520-19c4214f082a.png?resizew=171)
(1)求直线PD与平面ABCD所成角的正弦值;
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
您最近一年使用:0次
6 . 如图,在四棱锥
中,
为
的中点,
为正三角形,底面
为直角梯形,
,
.在四棱锥
的平面展开图中,点
分别对应点
,
,
,
,且
,
,
三点共线,
,
,
三点共线,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/f659d907-562d-43f6-ae57-43946547bd91.png?resizew=421)
(1)证明:平面
平面
.
(2)设
,在棱
上是否存在一点
,使得
与平面
所成的角为
?若存在,求
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee50575e3ebd56c4f46dd0bbf8e55d3.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/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9460e8571262302490aca08902d67c4b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/f659d907-562d-43f6-ae57-43946547bd91.png?resizew=421)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07dcf279d1756918052618fcb9b39107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f069fa1ce8a5cc587ec39d427e84d3c3.png)
您最近一年使用:0次
解题方法
7 . 如图,直四棱柱
的底面是菱形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e2386225-9271-42bc-952a-c32cc340e5f0.png?resizew=182)
(1)求二面角
的大小;
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef6db191b1056697568c0d4587a747d9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e2386225-9271-42bc-952a-c32cc340e5f0.png?resizew=182)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91358e0dd259eceae4a61b643bf0545.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/957a3d3c306dfb26ac61c9cbf519622e.png)
您最近一年使用:0次
名校
8 . 如图,在四棱锥
中,
平面
,
,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/7203f6aa-48c3-45a7-9a64-75981edc4e4f.png?resizew=171)
(1)证明:平面
平面
;
(2)已知二面角
的平面角的余弦为
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf7679c8b4b1e442ce4286d4b0e9c32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d47dff1b9d37e2b2cb2afe4bd0c4c04f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/7203f6aa-48c3-45a7-9a64-75981edc4e4f.png?resizew=171)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)已知二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
您最近一年使用:0次
2021-07-21更新
|
1114次组卷
|
3卷引用:辽宁省丹东市2020-2021学年高一下学期期末数学试题
名校
解题方法
9 . 如图,在四边形
中,
,以
为折痕把
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
平面
;
(2)若
为
的中点,二面角
等于60°,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad2d7c7a8177255f745b3b8101b7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.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/307d38cc7012c328f1f22aa793fe76d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
您最近一年使用:0次
2020-05-12更新
|
1705次组卷
|
8卷引用:辽宁省沈阳市东北育才学校高中部2020届高三第八次模拟考试数学(理)试题
名校
10 . 如图,四棱锥P-ABCD的底面是正方形,E为AB的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee92e5d20f0583f559561ec83d32809.png)
(1)证明:
平面PCD.
(2)求DA与平面PCE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee92e5d20f0583f559561ec83d32809.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/3b4463a8-09af-4566-9164-bb054be11c5d.png?resizew=135)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
(2)求DA与平面PCE所成角的正弦值.
您最近一年使用:0次
2020-03-24更新
|
745次组卷
|
7卷引用:2020届辽宁省辽阳市高三一模考试数学(理)试题