名校
1 . 如图,四棱锥
的底面是边长为
的正方形,四条侧棱长均为
.点
分别是棱
上共面的四点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/c9b7cfc0-27d1-4d0a-b0dd-2d893d6da0e0.png?resizew=206)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8358ef1198259fc3efa09fe27e243606.png)
(2)若
,且二面角
大小为
,求
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/f45a602120845c28f8376f2be33e3535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230d107e304006eb9c3d94aed219f28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de56ae3f28a0424ea82b269fa4837205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963a91995abd4927d75406d16e10a81f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74a1536fb7546c769cdf684181b8997.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/c9b7cfc0-27d1-4d0a-b0dd-2d893d6da0e0.png?resizew=206)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8358ef1198259fc3efa09fe27e243606.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07dd741bc3f02d8552afbcf63fba4fb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863ff2bbb8fa034fbaa47f5ccd9dbc55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a74a1536fb7546c769cdf684181b8997.png)
您最近一年使用:0次
2 . 如图,在四棱锥
中,底面
为直角梯形,
,
,
为等边三角形,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/9c483880-7ac5-4235-b761-00741ba29112.png?resizew=196)
(1)证明:
平面
;
(2)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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc30354e481753169d7519f82e35f3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/9c483880-7ac5-4235-b761-00741ba29112.png?resizew=196)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,底面
是矩形,
平面
,
、
与平面
所成的角依次是
和
,
,
,
依次是
,
上的点,其中
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/e9868b70-77e3-485e-be54-e29a45b898f9.png?resizew=159)
(1)求直线
与平面
所成的角(结果用反三角函数值表示);
(2)求三棱锥
的体积.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71536440db7649d375d1b98c054d24d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbb2dce15f3d0fe839688575d2a8ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab2742cfab7efc384743da22816afe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5928b9bea09600c0b8d5997e32e01e12.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/e9868b70-77e3-485e-be54-e29a45b898f9.png?resizew=159)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec66c1d36c6c2be3d3fc4519dfca195e.png)
您最近一年使用:0次
4 . 如图,在四棱锥
中,
底面
,
,
,
,
,点
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/525c1b98-6bef-4ea8-ba67-c31eacf13f0f.png?resizew=187)
(1)证明:
面
;
(2)证明:面
面
;
(3)求直线
与面
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/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba814113887c21637c1954f244812f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/525c1b98-6bef-4ea8-ba67-c31eacf13f0f.png?resizew=187)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)证明:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2019-12-12更新
|
899次组卷
|
3卷引用:安徽省芜湖市第一中学2019-2020学年高二上学期期中考试数学(文)试题
5 . 如图,在长方体
中,
,
,点
在棱
上移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ebb5f72f-1daf-45c9-a863-4325b2cff680.png?resizew=193)
(1)证明:
;
(2)求直线
与平面
所成的角;
(3)当
为
的中点时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d64fc81c857b124268609a8beb77b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/ebb5f72f-1daf-45c9-a863-4325b2cff680.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fa81c1f81266b4ef3d471bc6bfc38d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11990928efcd42ebe7a82a5f1105a708.png)
您最近一年使用:0次
2019-12-01更新
|
445次组卷
|
2卷引用:江苏省扬州市邗江中学2019-2020学年高一上学期期中数学试题(新疆班)
名校
解题方法
6 . 如图,在四棱锥P﹣ABCD中,底面ABCD是直角梯形,AB∥CD,BC⊥CD,侧面PAB为等边三角形,AB=BC=2CD=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/78011a28-85d5-4c9d-ac9c-21135f7765bb.png?resizew=185)
(Ⅰ)证明:AB⊥PD;
(Ⅱ)若PD=2,求直线PC与平面PAB所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/78011a28-85d5-4c9d-ac9c-21135f7765bb.png?resizew=185)
(Ⅰ)证明:AB⊥PD;
(Ⅱ)若PD=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
7 . 如图,已知点E是圆心为O1半径为2的半圆弧上从点B数起的第一个三等分点,点F是圆心为O2半径为1的半圆弧的中点,AB、CD分别是两个半圆的直径,O1O2=2,直线O1O2与两个半圆所在的平面均垂直,直线AB、DC共面.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/7291a0ff-4530-451d-b521-de54e079b9e6.png?resizew=196)
(1)求三棱锥D﹣ABE的体积;
(2)求直线DE与平面ABE所成的角的正切值;
(3)求直线AF与BE所成角的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/7291a0ff-4530-451d-b521-de54e079b9e6.png?resizew=196)
(1)求三棱锥D﹣ABE的体积;
(2)求直线DE与平面ABE所成的角的正切值;
(3)求直线AF与BE所成角的余弦值.
您最近一年使用:0次
名校
8 . 如图所示,正方体
的棱长为1,
分别是棱
的中点,过直线
的平面分别与棱
交于
,设
求:
![](https://img.xkw.com/dksih/QBM/2019/11/6/2328235043495936/2328591902277632/STEM/7fd14571-6498-4d6a-a27c-02f62b2eaf4f.png?resizew=251)
(1)求
与面
所成的角的大小;
(2)求四棱锥
的体积
并讨论它的单调性;
(3)若点
是正方体棱上一点,试证:满足
成立的点的个数为6.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebecdc0f0f815ff0083d85d3f539b36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0b3c955fa0be5039141f46ee8e9a874.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193308ab66f6d89298c5764079ff7706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81c8a190d4efdbb560ce09945cef77fd.png)
![](https://img.xkw.com/dksih/QBM/2019/11/6/2328235043495936/2328591902277632/STEM/7fd14571-6498-4d6a-a27c-02f62b2eaf4f.png?resizew=251)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207fde4b813c3eadea10c023aa8d463e.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9676b0b48e4b05fad1fed46273ac63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b161756ce7d22dfe758c4cb784703aa3.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7416e05fbca7bf4f600a9b81c8f7eb2c.png)
您最近一年使用:0次
名校
9 . 《九章算术》中,将底面为长方形且有一条侧棱与底面垂直的四棱锥称之为阳马,将四个面都是直角三角形的四面体称之为鳖臑,首届中国国际进门博览会是某展馆棚顶一角的钢结构可以抽象为空间图形阳马,如图所示,在阳马
中,
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/7657ccaf-2b3b-41de-bbd4-816ea92a31d3.png?resizew=180)
(1)若
,斜梁
与底面
所成角为
,求立柱
的长;(精确到
)
(2)请证明四面体
为鳖臑;若
,
,
,点
为线段
上一个动点,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/7657ccaf-2b3b-41de-bbd4-816ea92a31d3.png?resizew=180)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f99571b26b832c7522ed80a7bc884eee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1006d62fa5723dc36286b8f5494f993e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b6816ac6ff3f3df456865d0135802d5.png)
(2)请证明四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96e070966ddc1d779fcfae475715936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.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/990b4e6a33c821c298dec22cf9fbf76e.png)
您最近一年使用:0次
名校
10 . 如图,在多面体
中,
、
、
均垂直于平面
,
,
,
,
,
,
分别是线段
和
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/aa7900d4-a54b-4dc0-9f3b-b78aaaab53cb.png?resizew=139)
(1)求
与
所成角的大小;
(2)求二面角
的大小;
(3)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d17d14819681c455a91d7678742368.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c122ca7141c43c15c783968f5f0dbc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2541f82b49c8a01194a686c0b73d85ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86c589939053ce21ce0a67cf40054a9.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/aa7900d4-a54b-4dc0-9f3b-b78aaaab53cb.png?resizew=139)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69418f38ada198be25a69cb651e33e04.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebc359166c408c16803f160e73b099e.png)
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