名校
解题方法
1 . 如图,在长方形
中,
,
为
的中点,将
沿
折起,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/1396b2bc-49c8-418c-ab27-a85c51d9256e.png?resizew=342)
(1)求证:平面
平面
;
(2)若
点满足
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100af11e6cb83b56437f2db7dadeb9f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804c0e2a375b5f4ff1c420532968efc3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/1396b2bc-49c8-418c-ab27-a85c51d9256e.png?resizew=342)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0760712e3e2ea02b755b751e760d0c55.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6edc65cd42f028c46b8050634724ccc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5266895d3c1fcb350a745bc779433b.png)
您最近一年使用:0次
2021-09-29更新
|
538次组卷
|
4卷引用:四川省成都市树德中学2021-2022学年高三上学期入学考试理科数学试题
名校
2 . 在四棱锥
中,
底面
,E是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/9/25/2815814254116864/2817313960230912/STEM/215afbad615b4ac88c95f14179f9169f.png?resizew=184)
(1)证明:
;
(2)证明:
平面
;
(3)求二面角
的余弦值.
![](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/4eecac27ddb2a22e530663d6623ab4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2021/9/25/2815814254116864/2817313960230912/STEM/215afbad615b4ac88c95f14179f9169f.png?resizew=184)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dac702fe64edf1bc265da4b98cf2a0.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
名校
解题方法
3 . 如图,在四棱锥
中,
,
,
,
为边
的中点,异面直线
与
所成的角为
.
![](https://img.xkw.com/dksih/QBM/2021/9/18/2810593511522304/2815984778870784/STEM/0b0c9b1b-1633-4043-bc3f-8b753f9cb5ca.png?resizew=266)
(1)在直线
上找一点
,使得直线
平面
,并求
的值;
(2)若直线
到平面
的距离为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6378fc7805bd0729f6a00a8bd2662d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3384e2b63e4be03a8762b819499e669b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://img.xkw.com/dksih/QBM/2021/9/18/2810593511522304/2815984778870784/STEM/0b0c9b1b-1633-4043-bc3f-8b753f9cb5ca.png?resizew=266)
(1)在直线
![](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/6e0684e0b09b04661c602437982c0397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f32f82942e12701f6ba4b87d02291b1.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452c39e9c252d158710c86a3263c9fe7.png)
您最近一年使用:0次
解题方法
4 . 如图,四边形ABCD与BDEF均为菱形,FA=FC,且∠DAB=∠DBF=60°.
(2)若菱形BDEF边长为2,求三棱锥E-BCD的体积.
(2)若菱形BDEF边长为2,求三棱锥E-BCD的体积.
您最近一年使用:0次
2021-09-24更新
|
318次组卷
|
4卷引用:广西普通高校2022届高三9月摸底考试数学(文)试题
5 . 如图,在四棱锥
中,平面
平面
,且
是边长为2的等边三角形,四边形
是矩形,
,M为BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/43f262c4-c54e-4336-b0e1-c7edb7376e85.png?resizew=223)
(1)证明:
;
(2)求二面角
的大小.
![](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/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/43f262c4-c54e-4336-b0e1-c7edb7376e85.png?resizew=223)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbcc91180cb7cc891f78dd3b1516e697.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212e8c352c4d9b022a057d7d7fa7dd14.png)
您最近一年使用:0次
解题方法
6 . 如图,在四棱锥P-ABCD中,侧面
底面ABCD,底面ABCD是菱形,侧面PAD是等边三角形,
,且PB与面PAD所成角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/34ceecf8-6fc1-4543-85db-d8c18cf85520.png?resizew=206)
(1)求四棱锥P-ABCD的体积;
(2)求二面角A-PB-C的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/34ceecf8-6fc1-4543-85db-d8c18cf85520.png?resizew=206)
(1)求四棱锥P-ABCD的体积;
(2)求二面角A-PB-C的余弦值.
您最近一年使用:0次
名校
解题方法
7 . 在底面是菱形的四棱锥S-ABCD中,已知
,BS=4,过D作侧面SAB的垂线,垂足O恰为棱BS的中点.
![](https://img.xkw.com/dksih/QBM/2021/4/9/2695932021612544/2809220658454528/STEM/d91a1156-f65a-4102-8aa7-3a482c097645.png?resizew=194)
(1)在棱AD上是否存在一点E,使得OE⊥侧面SBC,若存在求DE的长;若不存在,说明理由.
(2)求二面角B-SC-D的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da05478ac906a1be15a60f629bf08a7.png)
![](https://img.xkw.com/dksih/QBM/2021/4/9/2695932021612544/2809220658454528/STEM/d91a1156-f65a-4102-8aa7-3a482c097645.png?resizew=194)
(1)在棱AD上是否存在一点E,使得OE⊥侧面SBC,若存在求DE的长;若不存在,说明理由.
(2)求二面角B-SC-D的平面角的余弦值.
您最近一年使用:0次
2021-09-16更新
|
1213次组卷
|
2卷引用:浙江省台州市路桥中学2020-2021学年高二下学期返校考数学试题
名校
8 . 如图,边长为2的正方形
所在平面与平面
垂直,
与
的交点为
,
,且
,
![](https://img.xkw.com/dksih/QBM/2021/9/6/2802247616225280/2809211945762816/STEM/db383f9cdbbe4834b4ce6f57c0b67d2f.png?resizew=131)
(1)求证:
平面
;
(2)求直线AD与平面
所成线面角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b9d54cbbf601f4583659771eb534997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://img.xkw.com/dksih/QBM/2021/9/6/2802247616225280/2809211945762816/STEM/db383f9cdbbe4834b4ce6f57c0b67d2f.png?resizew=131)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
(2)求直线AD与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
名校
9 . 如图,在四棱锥
中,底面
为平行四边形,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2021/9/14/2808027926511616/2808870266445824/STEM/651a2655-97e0-4a24-9f2f-fdaf1f5d8850.png?resizew=268)
(1)证明:
平面
;
(2)若
,PB与平面
所成角的正弦值为
,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/3c4cb73e9d976cbfe9c590044fa69dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5ea309886e947ea7cb4b81716206fd.png)
![](https://img.xkw.com/dksih/QBM/2021/9/14/2808027926511616/2808870266445824/STEM/651a2655-97e0-4a24-9f2f-fdaf1f5d8850.png?resizew=268)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c7a937699f989b685f285041434000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
2021-09-15更新
|
976次组卷
|
5卷引用:湖北省新高考联考协作体2021-2022学年高二上学期开学考试数学试题
解题方法
10 . 如图,在棱长为4的正方体
中,设E是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/e0cf4309-87e9-45d4-9c67-9cea9375adc1.png?resizew=157)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/e0cf4309-87e9-45d4-9c67-9cea9375adc1.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c1acd7da8817385417e1dff25bfe25.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e63fa0d9702ebcae364f0d06db855a29.png)
您最近一年使用:0次