1 . 如图所示,该几何体是由一个直三棱柱ABE﹣DCF和一个四棱锥P﹣ABCD组合而成,其中EF=EA=EB=2,AE⊥EB,PA=PD
,平面PAD∥平面EBCF.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/9b21c69d-8c1a-4f8b-b2d2-97f887603a61.png?resizew=166)
(1)证明:平面PBC∥平面AEFD;
(2)求直线AP与平面PCD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4d62f6151ccf86058f295218f0e576.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/9b21c69d-8c1a-4f8b-b2d2-97f887603a61.png?resizew=166)
(1)证明:平面PBC∥平面AEFD;
(2)求直线AP与平面PCD所成角的正弦值.
您最近一年使用:0次
2020-03-16更新
|
297次组卷
|
2卷引用:贵州省部分重点中学2019届高三上学期高考教学质量评测卷(四)(期末)数学(理)试题
2 . 如图,在三棱锥P-ABC中,已知
,顶点P在平面ABC上的射影为
的外接圆圆心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/6a7e94d7-49d4-4af9-9e52-3a59e9685086.png?resizew=169)
(1)证明:平面
平面ABC;
(2)若点M在棱PA上,
,且二面角P-BC-M的余弦值为
,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c6222c552363e4fdcde842db15789b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/6a7e94d7-49d4-4af9-9e52-3a59e9685086.png?resizew=169)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(2)若点M在棱PA上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7dbba03abfd28e7629cefc4ed997388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b081566c9070661cd83612424bc67d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-01-10更新
|
1006次组卷
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5卷引用:西南名校联盟“3+3+3”2019-2020学年高考备考诊断性联考卷(一)理科数学
西南名校联盟“3+3+3”2019-2020学年高考备考诊断性联考卷(一)理科数学三省三校(贵阳一中,云师大附中,南宁三中)2019-2020学年高三12月联考数学(理)试题河北省衡水中学2019-2020学年高三下学期第九次调研数学(理)试题(已下线)专题08向量方法解决角和距离(练)(理科)第一篇 热点、难点突破篇-《2022年高考理科数学二轮复习讲练测》(全国课标版)(已下线)1.2.4 二面角(分层训练)-2023-2024学年高二数学同步精品课堂(人教B版2019选择性必修第一册)
3 . 如图,在三棱柱
中,侧棱
底面
,底面
是正三角形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bfd0a1577203a09814b25bcdb59941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d178e36807ed1266d300dc850a957aa.png)
![](https://img.xkw.com/dksih/QBM/2020/1/9/2373269142536192/2373984737361920/STEM/dec05d8a327144b09a2d97334e6b6ad4.png?resizew=180)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6eca7a916f82bdbc5444e92e84aaa6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bfd0a1577203a09814b25bcdb59941.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d178e36807ed1266d300dc850a957aa.png)
![](https://img.xkw.com/dksih/QBM/2020/1/9/2373269142536192/2373984737361920/STEM/dec05d8a327144b09a2d97334e6b6ad4.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d560542b646924eaf577480ac73281b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
您最近一年使用:0次
2020-01-10更新
|
718次组卷
|
2卷引用:河北省邯郸市2019-2020学年高三上学期期末考试数学(理)试题
4 . 已知四棱柱
的底面为菱形,
,
,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/324a68eb-6832-4cc9-83ab-c08c392ff6ea.png?resizew=204)
(1)证明:
平面
;
(2)求钝二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd6edf5b50fea3628f602f397ceafcd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/324a68eb-6832-4cc9-83ab-c08c392ff6ea.png?resizew=204)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547a4b438e2e6687c7cd55ea08bbaae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求钝二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104bf24922707215be95a860cd533940.png)
您最近一年使用:0次
2019-12-27更新
|
1450次组卷
|
9卷引用:山东省东营市第一中学2022-2023学年高三上学期期末数学试题
山东省东营市第一中学2022-2023学年高三上学期期末数学试题山东省九校2019-2020学年高三上学期12月检测数学试题(已下线)卷07-备战2020年新高考数学自学检测黄金10卷-《2020年新高考政策解读与配套资源》(已下线)专题15 运用空间向量研究立体几何问题-2021年高考数学二轮优化提升专题训练(新高考地区专用)【学科网名师堂】浙江省2021届高三高考数学预测卷(一)(已下线)专题23 盘点空间面面角的问题——备战2022年高考数学二轮复习常考点专题突破新疆乌鲁木齐市第八中学2020-2021学年高二下学期第一阶段考试数学(理)试题福建省泉州第一中学2021-2022学年高二上学期期中考试数学试题重庆市荣昌中学2023-2024学年高二上学期第一次月考数学试题
5 . 如图1,在直角梯形
中,
分别为
的三等分点
,
,
,
,若沿着
折叠使得点
重合,如图2所示,连结
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/2d8ad4be-6d7a-4933-9836-bcfa1c440a51.png?resizew=273)
(1)求证:平面
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6140e26542bd6e9a540fa879f8d53b17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af620f6d204d310d8e3f267fdd6c3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae6f27071d24e39c6609322cc733466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860953cd28bf34eb9a500f283007ac28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a4661e4c577810e175213456c66466.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/2d8ad4be-6d7a-4933-9836-bcfa1c440a51.png?resizew=273)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c9529795ba241d68e1c4ce912b4334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ab2665c9f4c53c8637ae7f1f6c6237.png)
您最近一年使用:0次
2019-12-16更新
|
598次组卷
|
3卷引用:内蒙古乌兰察布市等五市2019-2020学年高三1月调研考试(期末)数学(理)试题
名校
6 . 如图,在三棱锥
中,平面
平面
,
为等边三角形,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/89a56215-dea8-4ad9-a5bd-973f4ff03dc6.png?resizew=220)
(1)证明:
;
(2)若
,求二面角
平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63ab13ef156d034b710d811e09b0be34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/89a56215-dea8-4ad9-a5bd-973f4ff03dc6.png?resizew=220)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd8ba7eb52e38857830162e770f534.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87aed767c861502aff771e6b0114746c.png)
您最近一年使用:0次
2019-11-21更新
|
2370次组卷
|
8卷引用:2020届山东省临沂市郯城县高三上学期期末数学试题
7 . 已知正三棱柱
的所有棱长都相等,M为
的中点,N为
的中点,则直线CM与AN所成的角的余弦值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bebb9d0950db392cbe960641f648df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5b6dfff10cb3dc3e06509db56d7b9d.png)
您最近一年使用:0次
8 . 如图,在空间直角坐标系
中,已知正四棱锥
的高
,点
和
分别在
轴和
轴上,且
,点
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/8cb90ab1-c1ad-402e-a5c0-20e75e315857.png?resizew=244)
(1)求直线
与平面
所成角的正弦值;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07445aa3909818a3ef93bb01182f545f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598ced81edb0ef99f0a81daf450a78ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/8cb90ab1-c1ad-402e-a5c0-20e75e315857.png?resizew=244)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
9 . 如图,四棱锥中
,底面
为直角梯形,
,
,平面
底面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ee2f56da-053f-48c4-a16a-90ec702ac2ff.png?resizew=129)
(Ⅰ)判断平面
与平面
是否垂直,并给出证明;
(Ⅱ)若
,
,
,求二面角
的余弦值.
![](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/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ee2f56da-053f-48c4-a16a-90ec702ac2ff.png?resizew=129)
(Ⅰ)判断平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
10 . 如图,在四棱锥
中,
底面
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/b7a61586-c415-4115-8707-95df97a3c98a.png?resizew=239)
(1)求证:
平面
;
(2)若点
在线段
上,且满足
,求直线
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/a1cb23cb7d9f22cfc31a6cd6fcb12e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26eba7e649fade39fd2d0b6ef4ac5ffd.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/2022/12/6/b7a61586-c415-4115-8707-95df97a3c98a.png?resizew=239)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e8c1551d814f36aa6773ff5986c800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
您最近一年使用:0次