1 . 如图,ABCD为矩形,点A、E、B、F共面,
和
均为等腰直角三角形,且
若平面
⊥平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d10a2b20f36f9f1460c764b34ff5b8.png)
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988499403849728/2989710593433600/STEM/fcdb6911-e98f-469d-8f8e-d3b726313c50.png?resizew=206)
(1)证明:平面
平面ADF
(2)问在线段EC上是否存在一点G,使得BG∥平面
若存在,求出此时三棱锥
与三棱锥
的体积之比,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c9a7ea20f09112c8df91748909dda0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d10a2b20f36f9f1460c764b34ff5b8.png)
![](https://img.xkw.com/dksih/QBM/2022/5/27/2988499403849728/2989710593433600/STEM/fcdb6911-e98f-469d-8f8e-d3b726313c50.png?resizew=206)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2d28f1e7a6b17401c19c34beddcbe0.png)
(2)问在线段EC上是否存在一点G,使得BG∥平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e1725c621bef19bb67a0312b8c9458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dc3b7e87324cf7e1101a0b30dfa18f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e73e175c5155281143312d97969009c.png)
您最近一年使用:0次
2 . 如图,在四棱锥
中,底面
为平行四边形,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e106f4233be16e98f2c1bf9f1635622.png)
平面
,
平面
,
,
,
![](https://img.xkw.com/dksih/QBM/2022/5/23/2985594652540928/2987175225884672/STEM/bee1cae3-caf1-46de-8850-7c958f50b3e3.png?resizew=181)
(1)求证:
;
(2)若
为
的中点.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e106f4233be16e98f2c1bf9f1635622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42deb2a4f5fd3513109c61037171507b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://img.xkw.com/dksih/QBM/2022/5/23/2985594652540928/2987175225884672/STEM/bee1cae3-caf1-46de-8850-7c958f50b3e3.png?resizew=181)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2686149cd09003b9dcccb51d81fe51ee.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe67036b4671b5d2a5c55b48c4d3bb9.png)
您最近一年使用:0次
名校
3 . 如图,在直三棱柱
中,
,M为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986375844134912/2987160175001600/STEM/bf4a676b-de88-4ebe-8bad-7ecb656d44b3.png?resizew=116)
(1)若
,证明:
平面
;
(2)若
是正三角形,P为线段
上的动点,求
与平面
所成角的正弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aecbbbb07039aae970fc3a6fd1cd0e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986375844134912/2987160175001600/STEM/bf4a676b-de88-4ebe-8bad-7ecb656d44b3.png?resizew=116)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f36f074d1dc1054c679236ec70dcaf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2022-05-25更新
|
894次组卷
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3卷引用:重庆市第八中学校2022届高考全真模拟数学试题
4 . 如图,在三棱锥
中,平面
平面
,且
,
,
,
.点E、F分别为
上的点,满足
,点G为线段
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/c2fbd0d1-3d41-47b2-91be-35c7848f0801.png?resizew=198)
(1)证明:平面
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/341e8dae00f6b2abc94199ccfd6cf180.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65aff0abef2633a6c96690a43285d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec451c43455189eae382b7709b3ae80e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe2686ad073830532a9895dbbbe0aee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/c2fbd0d1-3d41-47b2-91be-35c7848f0801.png?resizew=198)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2022-05-16更新
|
603次组卷
|
3卷引用:重庆市主城区2022届高三下学期三诊数学试题
名校
5 . 如图,四棱锥
的底面ABCD是等腰梯形,
,
,
,
是等边三角形,平面
平面ABCD,点M在棱PC上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/a6b79a48-c9eb-43c8-ac13-460f8df0d829.png?resizew=182)
(1)当M为棱PC中点时,求证:
;
(2)若点M满足:
,求锐二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/a6b79a48-c9eb-43c8-ac13-460f8df0d829.png?resizew=182)
(1)当M为棱PC中点时,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3a4c525f97e2c55660669fa87896368.png)
(2)若点M满足:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/496e7877fab55b8570f18833113217e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdf69383a0d728a62151c288f6bfecf.png)
您最近一年使用:0次
解题方法
6 . 如图所示,正方形ADEF与梯形ABCD所在的平面互相垂直,已知
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/73e79a0f-8581-4fa1-a9e6-d307229998c3.png?resizew=215)
(1)求证:
平面
;
(2)连接
,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffda707068a4a1778e79da6f20fb86d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/73e79a0f-8581-4fa1-a9e6-d307229998c3.png?resizew=215)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
您最近一年使用:0次
2022-05-07更新
|
596次组卷
|
3卷引用:重庆市缙云教育联盟2021-2022学年高一下学期5月质量检测数学试题
名校
7 . 如图,五棱锥
中,平面
平面ABCDE,
,△ABE为边长为4的等边三角形,四边形BCDE为等腰梯形,
,
.
,M为线段AP上一点,
.
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968726203768832/2972321959354368/STEM/79385f59-d44f-4f09-840a-4564b82b3458.png?resizew=220)
(1)求证:
平面MCD;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be89b9d1709d7974a108142c5fa2ccec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f249aefdd2e22cb95b48d9a74ab768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41f2f95d643629321deb6e905c4f1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e69b521526723ace41175d6754ae66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739959f37dd54f8c47bc34e322798ab6.png)
![](https://img.xkw.com/dksih/QBM/2022/4/29/2968726203768832/2972321959354368/STEM/79385f59-d44f-4f09-840a-4564b82b3458.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95475bfc06e884754eb4a455c3f434e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d639bc8b486be1176e595f82511f50.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在五面体ABCDE中,已知
平面BCD,
,且
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937671641522176/2938724601454592/STEM/3a0be7c234654ef0830221d8a956d824.png?resizew=178)
(1)求证:平面
平面ABC;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4025b7c8380b8aeb5a31a5e14eafa98b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d05426a41ec7b22c0445bfe78d786c8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7422660f0635be92e11838af5f4b4b5e.png)
![](https://img.xkw.com/dksih/QBM/2022/3/16/2937671641522176/2938724601454592/STEM/3a0be7c234654ef0830221d8a956d824.png?resizew=178)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a351d71fa01d3f5920e374a8ee7b524.png)
您最近一年使用:0次
2022-03-18更新
|
1769次组卷
|
2卷引用:重庆市第八中学校2021-2022学年高二下学期6月月考数学试题
名校
9 . 如图,在三棱柱
中,
,
.
分别是
的中点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/ad951d1b-f5cb-4759-aa5b-fa73b330c10d.png?resizew=201)
(1)求证:
;
(2)若点
为线段
上的动点(不包括端点),求锐二面角
的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1604adab63e6350177d8130123dca0f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01cb42a22efe1cb63389ead33020a6b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d06f8edd1a1f18ca2dae700c6a29ab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/ad951d1b-f5cb-4759-aa5b-fa73b330c10d.png?resizew=201)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78c7764193985fc0a2d3f158dfed514.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e5777a34d4761364c48e2b53ab79ff1.png)
您最近一年使用:0次
名校
10 . 如图所示,四棱锥
中,△
为正三角形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892076218064896/2923249386692608/STEM/f0ea3c3e6ba742ce8b31e6228523723b.png?resizew=211)
(1)求四棱锥
的体积;
(2)求
与面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e2550fca125b1f9e31f65701e4d0637.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34f4a1d4e690ccc0efb3e38d8261aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490f0c21a0bfecc1447d54803af0b119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/379b96bd6556f8b3f1f6f331d24e8283.png)
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892076218064896/2923249386692608/STEM/f0ea3c3e6ba742ce8b31e6228523723b.png?resizew=211)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5164a3cc47e266446d49127e2ef10c37.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2022-02-24更新
|
1374次组卷
|
3卷引用:重庆市南开中学2022届高三下学期高考模拟数学试题