1 . 如图,在底面为梯形的四棱锥
中,
,
,
平面PAD,Q为AD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/6440bb3a-e466-4809-bbe9-ba32c6ab3889.png?resizew=148)
(1)证明:
平面PBQ;
(2)求直线PC与平面PAB所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bcafbee439900751244d05c5a935a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/12/6440bb3a-e466-4809-bbe9-ba32c6ab3889.png?resizew=148)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
(2)求直线PC与平面PAB所成角的正弦值.
您最近一年使用:0次
2021-09-01更新
|
623次组卷
|
5卷引用:山西省大同市灵丘县豪洋中学2022届高三上学期开学摸底联考数学(理)试题
山西省大同市灵丘县豪洋中学2022届高三上学期开学摸底联考数学(理)试题山西省大同市灵丘县2022届高三上学期8月开学摸底联考数学(理)试题广东省2022届高三上学期开学摸底联考新高考卷数学试题百师联盟2022届高三上学期开学摸底联考(全国1卷)数学(理)试题(已下线)第九章 立体几何专练12—线面角大题2-2022届高三数学一轮复习
名校
2 . 如图,已知在四棱锥
中,底面
为等腰梯形,
,
,
为棱
上一点,
与
交于点
,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761104794034176/2762194789007360/STEM/abf8cf64da0f45ab98fbfdb4e0ae9345.png?resizew=308)
(1)证明:
;
(2)是否存在点
,使二面角
的余弦值为
?若存在,求出
点位置,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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c220eadc312101e2fb89dfe920f7b30d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37a4845312db03260e9987b70467987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e697f29fdbcb8bd70b4294a45d3e3c.png)
![](https://img.xkw.com/dksih/QBM/2021/7/10/2761104794034176/2762194789007360/STEM/abf8cf64da0f45ab98fbfdb4e0ae9345.png?resizew=308)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b757706eee506a078fc25e3f33a70cb.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9becfe76ad584897860dc957da44219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2404f102217c8d5a6ee46a92b5fc40de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
2021-07-11更新
|
1557次组卷
|
10卷引用:山西省运城市2022届高三上学期入学摸底测试数学(理)试题
山西省运城市2022届高三上学期入学摸底测试数学(理)试题湖南省邵阳市武冈市第二中学2021-2022学年高二上学期入学考试数学试题山东省泰安肥城市2021届高三高考适应性训练数学试题(二)江西省上高二中2022届高三8月月考数学(理)试题江西省宜春市2022届高三8月月考数学(理)试题(已下线)专题02 立体几何中存在性问题的向量解法-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)(已下线)专题1.11 空间向量与立体几何大题专项训练(30道)-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)江西省遂川中学2021-2022学年高二上学期第三次月考数学(理)试题(A卷)(已下线)专题10 导数及其应用-备战2022年高考数学母题题源解密(新高考版)(已下线)专题04 立体几何-备战2022年高考数学母题题源解密(新高考版)
解题方法
3 . 如图,
为正方体,下面结论中正确的是___________ .(把你认为正确的结论都填上)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/de8ec191-b07d-47fa-96ac-db3fdf3d3c02.png?resizew=175)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
③
与底面
所成角的正切值是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7881094ce2f907c3aaf664318ecd3e2d.png)
④过点
与异面直线
与
成
角的直线有2条.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/de8ec191-b07d-47fa-96ac-db3fdf3d3c02.png?resizew=175)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4645450a006f2c20087486d0833afbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6392ebb67310d3a4cd0332c06c70390b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f84d1ed2ff6f93bf229c738c58c15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7881094ce2f907c3aaf664318ecd3e2d.png)
④过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9721059d158853671eaf19e39769b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ca5ec71fe00c66415888cdb4921fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
您最近一年使用:0次
4 . 如图,在四棱锥
中,侧面
底面
,侧面
是边长为
的等边三角形,底面
是正方形,
是侧棱
上的点,
是底面对角线
上的点,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/40170325-1002-4b94-aa90-42f3becb4733.png?resizew=191)
(Ⅰ)求证:
;
(Ⅱ)求证:
平面
;
(Ⅲ)求点
到平面
的距离.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4eebde0291ae62d02a498b56358ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31ac7b134d8d1136f90233addaa4723f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/40170325-1002-4b94-aa90-42f3becb4733.png?resizew=191)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(Ⅲ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
解题方法
5 . 如图,在等腰梯形
中,
,
,
,
,
为梯形
的高,将
沿
折到
的位置,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/7558879c-fd49-420f-97c4-6b65bf3bd031.png?resizew=468)
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ab46164b23af7a4c4907f176e392ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0db05afb249755c12f51ca4b715b54d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/7558879c-fd49-420f-97c4-6b65bf3bd031.png?resizew=468)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db807b09cc550f476b3f8fa0c6a14425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2020-02-27更新
|
204次组卷
|
2卷引用:山西省怀仁市第一中学云东校区2020-2021学年高二下学期第一次月考(入学考试)数学(理)试题
2010·北京西城·一模
名校
6 . 在四棱锥
中,侧面
底面
,
,
为
中点,底面
是直角梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/8/13/2527151783485440/2529352429617152/STEM/7ce877516d1c498fb0e2348ee15106ad.png?resizew=190)
(1)求证:
平面
;
(2)求证:
平面
;
(3)设
为侧棱
上一点,
,试确定
的值,使得二面角
为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37002ada5d194d4d062fa3285d7d9824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16114c73382b18f060150f2ab1f1484d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://img.xkw.com/dksih/QBM/2020/8/13/2527151783485440/2529352429617152/STEM/7ce877516d1c498fb0e2348ee15106ad.png?resizew=190)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ba7a4f5ec17e1792c9a7ed23349bbbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32bff9fff7a158e95a7f5041629e7a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
您最近一年使用:0次
2020-08-17更新
|
274次组卷
|
6卷引用:山西省怀仁市第一中学云东校区2020-2021学年高二下学期第一次月考(入学考试)数学(理)试题
山西省怀仁市第一中学云东校区2020-2021学年高二下学期第一次月考(入学考试)数学(理)试题新疆乌鲁木齐市第七十中学2020-2021学年高二上学期期末考试数学(理)试题(已下线)北京市西城区2010年高三一模数学(理)试题(已下线)2010年靖安中学高三高考模拟考试数学卷2020届河北省新乐市第一中学高三下学期高考冲刺数学试题(已下线)专题20 立体几何综合-2020年高考数学(理)母题题源解密(全国Ⅱ专版)