1 . 如图,正方体
的棱长为4,E,F分别是
上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/2e3e76cd-6005-423c-ad0c-67b561053ffa.png?resizew=176)
(1)求
与平面
所成角的正切值;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b48dc882f8ebb3d964e85f07381380.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/2e3e76cd-6005-423c-ad0c-67b561053ffa.png?resizew=176)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc725182c2fd1413319fea35b95c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e7c16fcd117047c6c81ab37118e4c5.png)
您最近一年使用:0次
解题方法
2 . 如图所示的四棱锥
中,底面
为正方形,平面
平面
,O、M,E分别是
、
,
的中点,
.
![](https://img.xkw.com/dksih/QBM/2022/1/3/2886401620672512/2894440612536320/STEM/56dd3179-6b3e-4015-8ccd-3569dc960724.png?resizew=221)
(1)若点N在直线
上,求证:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbb79892c8cb8871a08437acc09bc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afd9abf8db430cd1a65ad486148312a8.png)
![](https://img.xkw.com/dksih/QBM/2022/1/3/2886401620672512/2894440612536320/STEM/56dd3179-6b3e-4015-8ccd-3569dc960724.png?resizew=221)
(1)若点N在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47545dd7022ac4b965db28743e2f15dc.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4837d8adb8799a7a6b518729f2eb2a.png)
您最近一年使用:0次
名校
3 . 如图,在五面体
中,
平面
,
,
,M为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/3ad0bd3a-3248-4ad2-835c-d6aca872922c.png?resizew=183)
(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/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147e7c8ba0bbb540a712f6eb2ed6d22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ac9001a8577e62e945edede16ff505f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4971053cca6577773936c64add531503.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/3ad0bd3a-3248-4ad2-835c-d6aca872922c.png?resizew=183)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8a20c1fc8a5620db5db3a74eb01201.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8a20c1fc8a5620db5db3a74eb01201.png)
您最近一年使用:0次
2022-01-11更新
|
442次组卷
|
5卷引用:广西贺州市昭平县昭平中学2021-2022学年高二上学期第一次月考数学(理)试题
名校
4 . 如图,在四棱锥P-ABCD中,底面ABCD是平行四边形,侧棱PD
底面ABCD,PD=DA=DB,PB⊥BC,E为PB中点,F为PC上一点,且PC=3PF.
![](https://img.xkw.com/dksih/QBM/2022/1/6/2853255502561280/2890704287031296/STEM/f45643cd967e454d937f955fd7b65a44.png?resizew=233)
(1)求证:PC⊥DE;
(2)求平面DEF与平面ABCD夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2853255502561280/2890704287031296/STEM/f45643cd967e454d937f955fd7b65a44.png?resizew=233)
(1)求证:PC⊥DE;
(2)求平面DEF与平面ABCD夹角的余弦值.
您最近一年使用:0次
2022-01-09更新
|
523次组卷
|
3卷引用:广西蒙山县第一中学2021-2022学年高二上学期期末考试理科数学试题(二)
解题方法
5 . 将边长为2的正方形ABCD沿对角线BD折叠,使得平面
平面CBD,
平面ABD,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/abc97baf-e138-460f-baa0-e7596da8d53a.png?resizew=173)
(1)求DE与平面BEC所成角的正弦值;
(2)直线BE上是否存在一点M,使得CM∥平面ADE,若存在,确定点M的位置,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338c6c83ab4abc895ac36ab888a55be6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/abc97baf-e138-460f-baa0-e7596da8d53a.png?resizew=173)
(1)求DE与平面BEC所成角的正弦值;
(2)直线BE上是否存在一点M,使得CM∥平面ADE,若存在,确定点M的位置,若不存在,请说明理由.
您最近一年使用:0次
名校
解题方法
6 . 四棱锥
中,
底面
,
,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/2585f887-45df-4e9c-a89a-399d38013234.png?resizew=207)
(1)求证:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.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/c800b6aabdc453e2c7e343061e9c6a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5679a74e9f5506266ab627894ab03243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bf7fd88470d11083cb88f210fbc62f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/2585f887-45df-4e9c-a89a-399d38013234.png?resizew=207)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd470cd9dfcde7f7e1762af28bc649c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea440fcc8f186f5de9105b18e152152.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5000fea066102e62cf2128ccbbd2b3e3.png)
您最近一年使用:0次
2021-11-20更新
|
362次组卷
|
2卷引用:广西玉林市博白县第四中学(博白县中学书香校区)2022-2023学年上学期高二9月月考数学试题
名校
7 . 已知三棱锥
中,
平面
,
,
,
为
上一点,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/9/2847428994875392/2850375363469312/STEM/32e720c4-43de-4fb2-8cf9-f78876ec07ec.png?resizew=246)
(1)证明:
;
(2)求
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963533f60ba5138cfdfdca7030a8f663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6813b47d087578bf054bcf56b64b42a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2021/11/9/2847428994875392/2850375363469312/STEM/32e720c4-43de-4fb2-8cf9-f78876ec07ec.png?resizew=246)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ea7dcb6e94618da188f06a68a3306d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03c5e1e4e2669563b22dcf05bfb9b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
您最近一年使用:0次
名校
8 . 如图,在多面体
中,四边形
是梯形,四边形
为矩形,
面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/c72fb148-a734-49d0-bb4a-773010789cba.png?resizew=171)
(1)求证:
平面
;
(2)点
为线段
的中点,求证
面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8139d9fd5c670c91aa7dc485366dd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb673275c8a3cf9a12086b7661018d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/c72fb148-a734-49d0-bb4a-773010789cba.png?resizew=171)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071159cac13097ea0928285bc1be66d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152cfd5011c94e02c1a9cbbd4d8f58bb.png)
您最近一年使用:0次
2021-11-13更新
|
648次组卷
|
2卷引用:广西钦州市第一中学2021-2022学年高二上学期期中考试数学(理)试题
名校
解题方法
9 . 如图,在四棱锥
中,
底面
,底面
是边长为2的正方形,
,
、
、
分别为
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/2021/4/15/2700224365854720/2786856614633472/STEM/acdc044c-2680-4170-b7cc-c99f20b5ea3f.png?resizew=282)
(Ⅰ)证明:
平面
;
(Ⅱ)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a5faf3cbb633fc4294c8ce703c64c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4317430d5a2b61d9a2a88b73e7d7ad39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/4/15/2700224365854720/2786856614633472/STEM/acdc044c-2680-4170-b7cc-c99f20b5ea3f.png?resizew=282)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835766bda2c74b980454f83f3be8e5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70acd484e9cc365190e806a623907108.png)
(Ⅱ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193b5b41994c2a4dfa5bb0bc984061cc.png)
您最近一年使用:0次
2021-08-15更新
|
717次组卷
|
2卷引用:广西桂林市第十九中学2021-2022学年高二下学期期中考试数学(理)试题
名校
10 . 如图,在直三棱柱
中,点
为
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/5f6d740f-f588-43e9-a673-5e0d4b1d99bf.png?resizew=159)
(1)求证:
;
(2)求
与平面
所成角的正弦值;
(3)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba6147321d8b548d08a4c99a35e13a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7384a01976d547f25269bb76a418db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee631002406bf7468e534b647fc918a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/5f6d740f-f588-43e9-a673-5e0d4b1d99bf.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e86842fb89bd99d7731e9b94ed1780b.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ad3a1ea6790177130e16c2124984087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d041feacf189306d130f4a949880bfc8.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec02a3e6f5275ba428153383aee91ab0.png)
您最近一年使用:0次
2021-05-11更新
|
591次组卷
|
2卷引用:广西平果市铝城中学2023-2024学年高二上学期期末模拟数学试题(一)