名校
解题方法
1 . 如图,在几何体
中,四边形
是边长为
的菱形,且
,
,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710485519810560/2710816896286720/STEM/4f4a837d-02af-4797-a69c-3853991ec28b.png?resizew=288)
(1)求证:平面
平面
;
(2)若平面
与平面
所成锐二面角的余弦值为
,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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686171942bd7698035016c732db43b63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d60513cfa8e0e96b436194834d738af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ebdc05dbd46e98457b80c350538d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79c1acdd27cebb11e0266464b03b3afb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/4/29/2710485519810560/2710816896286720/STEM/4f4a837d-02af-4797-a69c-3853991ec28b.png?resizew=288)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2d28f1e7a6b17401c19c34beddcbe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2021-04-30更新
|
378次组卷
|
2卷引用:山西省太原市2021届高三二模数学(理)试题
2 . 如图三棱锥
分别在线段AB,CD上,且满足
.
平面
;
(2)求AD与平面BCD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f945abf354473baeac18d1cbcdfc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4de8d419b22a415830399c4eeb708f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1776d156423ea523de87fbca6c0b6019.png)
(2)求AD与平面BCD所成角的正弦值.
您最近一年使用:0次
3 . 如图,三棱锥
中,
平面
,
,
分别在棱
上,且
于
,
于
,则下列说法正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/654beaf7-4b38-4755-92c8-5355d9e25748.png?resizew=196)
①
是直角
②
是异面直线
与
所成角
③
是直线
与平面
所成角
④
是二面角
的平面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97bde5efa645a4c1ed6874088400d6a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d320f180419175d75eebc618cc458b39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9d0c688e55286443c9974797fc647f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/654beaf7-4b38-4755-92c8-5355d9e25748.png?resizew=196)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2ee75a234ac05a3225e49ddd8c5065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d16fab0f52c8af5abba0bf19a06ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024015816ece1fd176186ed0f04db8f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd29cc627d76412c236aac6b29fa0fdf.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2020-01-20更新
|
453次组卷
|
3卷引用:山西省运城中学校2022届高三冲刺模拟(一)数学(文)试题
4 . 如图,在正方体
中,点
是线段
上的动点,点
为正方体对角线
上的动点,若三棱锥
的体积为正方体体积的
,则直线
与底面
所成角的正切值为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/69496072-2af4-448c-a391-f88e1b377725.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b5fa09ae5322a54223003c47065d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158b045c6172c4178d7aa52083e1489f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/69496072-2af4-448c-a391-f88e1b377725.png?resizew=139)
A.![]() | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
2019-06-18更新
|
598次组卷
|
2卷引用:【校级联考】晋冀鲁豫中原名校2019年高三第三次联考数学(文)试题
名校
5 . 如图,在三棱柱
中,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/b8015de1-0ce6-49b8-9c2e-69a7151e8301.png?resizew=219)
(1)求证:平面
平面
;
(2)若
,求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ea8821d44ee1f9332096263e7508e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/b8015de1-0ce6-49b8-9c2e-69a7151e8301.png?resizew=219)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd46e953a88b4fa192bb0e1dc9e7614d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1001e20567e416c9072a994de0e90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
您最近一年使用:0次
2020-08-07更新
|
348次组卷
|
2卷引用:2020届山西省高三高考考前适应性测试(二)数学(文)试题
名校
6 . 如图,
是一个三棱锥,
是圆的直径,
是圆上的点,
垂直圆所在的平面,
,
分别是棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/90d4f3a3-01d4-468e-a380-243fb399361f.png?resizew=222)
(1)求证:
平面
;
(2)若二面角
是
,
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/90d4f3a3-01d4-468e-a380-243fb399361f.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e231505648333857565accb0c3c898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3304d151a8d42f932fbfb96f06bd9b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
2020-01-15更新
|
338次组卷
|
4卷引用:山西大学附属中学2021届高三模拟Ⅱ数学试题
名校
7 . 如图,在正方体
中,点
是线段
上的动点,则下列说法正确的是______ (填序号)
![](https://img.xkw.com/dksih/QBM/2020/7/7/2500980369276928/2501468140527616/STEM/f636a448bf0c4cf9a5c6da15a2cffec8.png?resizew=254)
①无论点
在
上怎么移动,都有
;
②无论点
在
上怎么移动,异面直线
与
所成角都不可能是
;
③当点
移动至
中点时,直线
与平面
所成角最大;
④当点
移动至
中点时,才有
与
相交于一点,记为点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/2020/7/7/2500980369276928/2501468140527616/STEM/f636a448bf0c4cf9a5c6da15a2cffec8.png?resizew=254)
①无论点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/988529f2aa3fc7ea0f15bbf68d552598.png)
②无论点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
③当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
④当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f348ed8a1690d3ed02aa64459ca50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724829ff623c26736eced10ab14a1a68.png)
您最近一年使用:0次
名校
解题方法
8 . 设二面角
的大小为
,
点在平面
内,
点在
上,且
,则
与平面
所成的角的大小为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/841fd0fa8a74819abb9be405787a932c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
您最近一年使用:0次
2017-03-17更新
|
1503次组卷
|
3卷引用:2017届山西省晋中市高三3月高考适应性调研考试理数试卷
名校
9 . 已知平面α及直线a,b,则下列说法正确的是( )
A.若直线a,b与平面α所成角都是30°,则这两条直线平行 |
B.若直线a,b与平面α所成角都是30°,则这两条直线不可能垂直 |
C.若直线a,b平行,则这两条直线中至少有一条与平面α平行 |
D.若直线a,b垂直,则这两条直线与平面α不可能都垂直 |
您最近一年使用:0次
2018-02-10更新
|
446次组卷
|
6卷引用:山西省临汾市2017届高三考前适应性训练考试(三)数学(理)试题
10 . 如图,三棱柱
中,侧面
为
的菱形,
.
![](https://img.xkw.com/dksih/QBM/2018/3/8/1897678751105024/1898582824738816/STEM/381cd48f4f384ed989c229263fa7d0d2.png?resizew=227)
(1)证明:平面
平面
.
(2)若
,直线
与平面
所成的角为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2e238b2757353026133bbe495645e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d31a4ddb10768e9e7868d0c34c425f.png)
![](https://img.xkw.com/dksih/QBM/2018/3/8/1897678751105024/1898582824738816/STEM/381cd48f4f384ed989c229263fa7d0d2.png?resizew=227)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3a59d7bf91a7540e35ce0011ad9b97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7870cee007535b979d35bc7feab75616.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
您最近一年使用:0次
2018-03-09更新
|
579次组卷
|
3卷引用:山西省平遥中学2018届高三3月高考适应性调研考试数学(理)试题