1 . 在四棱锥
中,底面
为梯形﹐
,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/2782989f-bab7-451f-82af-13b55c27522f.png?resizew=156)
(1)证明: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/9742a7f64ff91be02601331f4ef2bb4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d979b5227ce71cd02d29ba156d3ad3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6309e71937105a5683e19babaf4e58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/2782989f-bab7-451f-82af-13b55c27522f.png?resizew=156)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a0d238b6e9b49bbea22a79402e8e4f.png)
您最近一年使用:0次
2021-09-13更新
|
2126次组卷
|
8卷引用:神州智达省级联测2021-2022学年高三上学期第一次考试数学试题
神州智达省级联测2021-2022学年高三上学期第一次考试数学试题河北省省级联测2022届高三上学期第一次考试数学试题黑龙江省牡丹江市海林市朝鲜族中学2022-2023学年高三上学期第三次月考数学(理)试题(已下线)专题03 直线与平面所成角(含探索性问题)-【解题思路培养】2022年高考数学一轮复习解答题拿分秘籍(全国通用版)黑龙江省七台河市勃利县高级中学2021-2022学年高二上学期9月月考数学试题山西省太原市第五十六中学校2022-2023学年高二上学期10月联考数学试题安徽省阜阳市阜南实验中学2022-2023学年高二上学期第二次质量检测数学试题广东省兴宁市沐彬中学2022-2023学年高二上学期第二次月考数学试题
名校
解题方法
2 . 如图,棱长为1的正方体
中,
为线段
上的动点(不含端点),则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/8a5fad68-796c-49c2-9c43-8a2fed07e059.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/8a5fad68-796c-49c2-9c43-8a2fed07e059.png?resizew=163)
A.直线![]() ![]() ![]() |
B.平面![]() ![]() |
C.三棱锥![]() |
D.平面![]() |
您最近一年使用:0次
2021-09-04更新
|
2198次组卷
|
6卷引用:河北省衡水市武邑中学2024届高三上学期第三次调研考试数学试题
名校
解题方法
3 . 如图,四边形
为正方形,
分别为
的中点,以
为折痕把
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/4fa355c0-dcd8-4ec2-9da1-41378b334aeb.png?resizew=216)
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d93949d8a15aca4e79cedb978590571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a37ba261860ddad9d11b2e8348a8f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac536e856feb18e6675a661f8fa44470.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/4fa355c0-dcd8-4ec2-9da1-41378b334aeb.png?resizew=216)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f020ca4ad44801691235958e253907d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85719346f464a101d365d42be27450a3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013e58ab92ebfc889e2e0e2be903792e.png)
您最近一年使用:0次
2021-08-17更新
|
805次组卷
|
2卷引用:河南省光山县第二高级中学2023-2024学年高三上学期11月阶段测试数学试题
名校
解题方法
4 . 如图所示,在四棱锥
中,平面
平面
,
为等边三角形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/7914d301-b168-411b-b385-329554970493.jpg?resizew=157)
(1)求四棱锥
的体积;
(2)求平面
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/ac8fe4026f1a0745ab9aa9fe64f0e482.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958330f56d75b05fbf9144e6fd458be4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/7914d301-b168-411b-b385-329554970493.jpg?resizew=157)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
5 . 如图,在四棱锥
中,平面
平面
,
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718627252404224/2719709336920064/STEM/0c75e768-3696-4432-8c6e-1dbc6a71b9b8.png)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值;
(3)在棱
上是否存在点
,使得平面
与平面
所成的锐二面角余弦值为
?若存在,求
的值;若不存在、说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/5732edb0ebc901cc220dca71f96775d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/958330f56d75b05fbf9144e6fd458be4.png)
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718627252404224/2719709336920064/STEM/0c75e768-3696-4432-8c6e-1dbc6a71b9b8.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f239fbcc58fc15535db4b5084c4f7253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69d048ac0c9b13b54417c2e2de17082b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f32f82942e12701f6ba4b87d02291b1.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,直三棱柱
的侧面
为矩形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/23997beb-41bf-456a-a3e3-94d5e9f4e633.png?resizew=160)
(1)求证:平面
平面
;
(2)设
为
的中点,求平面
与平面
所成锐角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe236a434aa88e5633ea61574d1bed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/23997beb-41bf-456a-a3e3-94d5e9f4e633.png?resizew=160)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140088b0cb73812aa9d523c44559298a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
您最近一年使用:0次
2021-09-09更新
|
960次组卷
|
2卷引用:四川省成都市蒲江县蒲江中学2020年高三上学期11月月考数学(理)试题
名校
7 . 如图,已知圆台
的下底面半径为2,上底面半径为1,母线与底面所成的角为
,
,
为母线,平面
平面
为
的中点,
为
上的任意一点.
![](https://img.xkw.com/dksih/QBM/2021/3/3/2670069832474624/2672083786514432/STEM/098a588b-9e42-4e85-baf3-a964ceca65d1.png)
(1)证明:
;
(2)当点
为线段
的中点时,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0a4f38420bb9215dbc9c875b755838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550d549789c10796087d258cf1d1bde7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ab35b3793bbd542738c481937772fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://img.xkw.com/dksih/QBM/2021/3/3/2670069832474624/2672083786514432/STEM/098a588b-9e42-4e85-baf3-a964ceca65d1.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb690c75525e6db35b411c8ef51ab11.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd9c299d7ed6e96cd09cae67d7bba41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73bce2ee14d4769b17c26ebca1788860.png)
您最近一年使用:0次
20-21高三下·全国·阶段练习
解题方法
8 . 如图在三棱柱
中,侧面
是边长为2的菱形,
,平面
平面
,
、
分别为
、
的中点,
.
![](https://img.xkw.com/dksih/QBM/2021/2/26/2666220692660224/2666646918594560/STEM/28c32273d54d418599c570f64ec6ef81.png?resizew=211)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c71892e3a5463e37f89a8c907416fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce04b35c265cc9c48b60204bd2f718ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bc7774144c164f7ebaeca54fa657e9.png)
![](https://img.xkw.com/dksih/QBM/2021/2/26/2666220692660224/2666646918594560/STEM/28c32273d54d418599c570f64ec6ef81.png?resizew=211)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd597851c0db4e4de4769e10e09383b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4e7552a39c412d882766dbcd7eeb69.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8653a84fd436378c5634b2188867275.png)
您最近一年使用:0次
解题方法
9 . 如图,三棱锥
中,
,
,
是等边三角形,E为
三等分点(靠近C点).
![](https://img.xkw.com/dksih/QBM/2021/2/14/2657961818071040/2658478787354624/STEM/19cce046fa5c43e2bab5c612a1883c5b.png?resizew=276)
(Ⅰ)求证:
;
(Ⅱ)当
时,求
与平面
所成线面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80137ee8af4684ce558242d8b3f1459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13c772461aef1d9d715129636739748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2021/2/14/2657961818071040/2658478787354624/STEM/19cce046fa5c43e2bab5c612a1883c5b.png?resizew=276)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4999d4fbcbe15f78c29d518f25d317c2.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75a2bdadae954b8eb129f2bef8d0a263.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
您最近一年使用:0次
解题方法
10 . 在如图所示的几何体中,
均为等边三角形,且平面
平面
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/dce9b9c1-6a0a-4572-8d28-6eee4b7c75ff.png?resizew=150)
(1)证明:
.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5337198d46a7c109b3552ce3843668fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c309e58bf083bad13abd549720a63a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/dce9b9c1-6a0a-4572-8d28-6eee4b7c75ff.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe7eaf967808dad0a184eeedfa27721.png)
(2)求二面角
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