1 . 如图,在四棱锥
中,底面
为正方形,点
在底面
内的投影恰为
中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/ac05e938-52a4-4bae-8a9c-f6e7e45ef8c7.png?resizew=220)
(1)若
,求证:
面
;
(2)若平面
与平面
所成的锐二面角为
,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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8361ee004d1e0716806b41a637a09c8a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/ac05e938-52a4-4bae-8a9c-f6e7e45ef8c7.png?resizew=220)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eb1c56398a34848942453685f53bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7442b64b37f685bc3ae88ff450c1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2022-11-28更新
|
1898次组卷
|
6卷引用:浙江省2023届高三数学原创预测卷一(全国1卷)
浙江省2023届高三数学原创预测卷一(全国1卷)福建省福鼎市第六中学2022-2023学年高三上学期12月月考试数学试题广东省揭阳市普宁国贤学校2022-2023学年高二上学期11月月考数学试题(已下线)江苏省盐城市、南京市2022届高三上学期1月第一次模拟考试数学试题变式题17-22(已下线)浙江省衢州、丽水、湖州三地市2022届高三(二模)数学试题变式题17-22(已下线)模块十一 立体几何-2
名校
2 . 如图所示正四棱锥
,P为侧棱SD上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/d0c1ae83-a3de-4493-9be8-8e56f7ca9cad.png?resizew=168)
(1)求证:
;
(2)求直线SC与平面ACP所成角的正弦值;
(3)侧棱SC上是否存在一点E,使得
平面PAC,若存在,求
的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db46bdc86215307e3b6c5c063740d533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1e319370a8ffcd86362379856d6b95.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/d0c1ae83-a3de-4493-9be8-8e56f7ca9cad.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c177e06cc3f703e8ca7be7c491fa2942.png)
(2)求直线SC与平面ACP所成角的正弦值;
(3)侧棱SC上是否存在一点E,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fea0808c7df5a3fa6678ee5406b35b25.png)
您最近一年使用:0次
2022-10-26更新
|
1562次组卷
|
3卷引用:北京市朝阳区北京中学2021-2022学年高二上学期期中数学试题
名校
3 . 如图,在三棱柱
中,底面是边长为2的等边三角形,
分别是线段
的中点,二面角
为直二面角.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/cd2ffec7-455a-44dc-b840-b1e30658bad4.png?resizew=217)
(1)求证:
平面
;
(2)若点
为线段
上的动点(不包括端点),求锐二面角
的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5056fb4a4e47b4f2bb80b35df5abad48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d06f8edd1a1f18ca2dae700c6a29ab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfeb93372b5ff8acf1f88d82a6086218.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/cd2ffec7-455a-44dc-b840-b1e30658bad4.png?resizew=217)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e5777a34d4761364c48e2b53ab79ff1.png)
您最近一年使用:0次
2022-11-22更新
|
1729次组卷
|
10卷引用:山东省潍坊市五县市2022-2023学年高二上学期期中数学试题
山东省潍坊市五县市2022-2023学年高二上学期期中数学试题山东省淄博市沂源县第一中学2022-2023学年高二上学期期中数学试题浙江省台州市书生中学2022-2023学年高二上学期期末模拟数学试题重庆市第一中学校2022-2023学年高一下学期5月月考数学试题河北省石家庄市辛集市2022-2023学年高二下学期期末数学试题(已下线)高二数学下学期期中模拟试卷(第6章-第8章,含数列和导数)-【题型分类归纳】2022-2023学年高二数学同步讲与练(苏教版2019选择性必修第二册)福建省莆田第二中学2023-2024学年高二上学期返校考试数学试题(已下线)第11讲 第一章 空间向量与立体几何 章末题型大总结(2)福建省福清西山学校2023-2024学年高二上学期9月月考数学试题(已下线)期中真题必刷常考60题(22个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)
4 . 如图所示,在四棱锥
中,底面
为正方形,侧面
为正三角形,
为
的中点,
为线段
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/09aa1e8c-cdad-424a-a136-43b58a4b1d84.png?resizew=218)
(1)若
为线段
的中点,求证:
//平面
;
(2)当
时,求平面
与平面
夹角的余弦值的范围.
![](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/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/09aa1e8c-cdad-424a-a136-43b58a4b1d84.png?resizew=218)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c1a03f93b56a1fb0b57d20d53b4323.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
解题方法
5 . 如图甲,在四边形
中,
,
,将
沿
折起得图乙,点
是
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/6ebc80a6-0f13-472d-90e4-8cf7e7e81ff6.png?resizew=313)
(1)若
为
的中点,证明:
平面
;
(2)若
,试确定
的位置,使二面角
的正弦值等于
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4864c21e9664fa9111ede6425b09563a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3185a8075eea774ea1c6298fd1d0f5af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d32f7d17decde7a4c9d066dc9d648530.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/6ebc80a6-0f13-472d-90e4-8cf7e7e81ff6.png?resizew=313)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3e27f6e6d1592408508cc9fd14d480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2e9ac46aabe38e5ea1a8cb0febc98af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
您最近一年使用:0次
2023-03-23更新
|
1487次组卷
|
3卷引用:贵州省2023届高三3+3+3高考备考诊断性联考(二)数学(理)试题
2023·全国·模拟预测
名校
6 . 如图,在四棱锥
中,平面
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/eedaa78a-a146-4087-bae0-537b1c77c7fa.png?resizew=158)
(1)证明:
.
(2)若
,点
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/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e198ba74cc4b55e69c48941acb01f0be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/29/eedaa78a-a146-4087-bae0-537b1c77c7fa.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69d166677557cadb3da32b4a7e152e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02535e1a690ca111ca7a395a1bf48080.png)
您最近一年使用:0次
7 . 如图所示,在三棱柱
中,
为正方形,
是菱形,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/9b6ca440-6e10-4f1f-af62-e40f6e82fa4d.png?resizew=205)
(1)求证:
;
(2)求平面
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b1925ea2bd4f25794463d586a160b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a904c6881536be51416116ab966cf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51221630159e52bda685680fa684d8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce04b35c265cc9c48b60204bd2f718ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a904c6881536be51416116ab966cf8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/9b6ca440-6e10-4f1f-af62-e40f6e82fa4d.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb81a917e1183890a82885b350b63f14.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d63354d35b9eef8732c993abe89f25e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733921499662632d390dad17391b3a7.png)
您最近一年使用:0次
名校
8 . 如图,在四棱锥
中,底面ABCD是平行四边形,
是边长为2的正三角形,平面
平面ABCD,
,
,S为CD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/e57b71a9-d739-4ca5-a9b2-a6d9a2814a26.png?resizew=205)
(1)求证:
;
(2)若M是PB的中点,求直线MD与平面ACP所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6be2b61f4a38e2ee2c1a01e00b3ae6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8f99467f791344ee3306c3ee95ced0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d7202543c2936a753cfad3ab31f129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f3178ab6bd13e4c36a29539fd65081d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8bb1ebb034e48ae054c737e53e1812a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/e57b71a9-d739-4ca5-a9b2-a6d9a2814a26.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2460a1743095444aef0a3e882cb60237.png)
(2)若M是PB的中点,求直线MD与平面ACP所成角的正弦值.
您最近一年使用:0次
名校
9 . 马戏团的表演场地是一个圆锥形棚,如图,
为棚顶,
是棚底地面的中心,
为棚底直径,
,
是棚底的内接正三角形,中间的支柱
米,从支柱上的
点向棚底周围拉了4根绳子
供动物攀爬表演,有一个节目表演的是猴子从
点沿着绳子
爬到
点,再沿着
爬到棚顶,然后从棚顶跳到
中的某一根绳子上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/cf507ce4-ee84-41cc-84f5-4fe0841b5f99.png?resizew=176)
(1)当
点取在距离
点
米处时,证明拉绳
所在直线和平面
垂直;
(2)经验表明当拉绳
所在直线和平面
所成角的正弦值最大时,节目的观赏性最佳,问此时应该把
点取在什么位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22538f4c49c5a0f1b1cf59773c218bd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d3c54b33e6ec883393f6630000446d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c7267e5313b9b00ef22c94a479fc34.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/cf507ce4-ee84-41cc-84f5-4fe0841b5f99.png?resizew=176)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed0325097927b92a6458bfbb0667b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)经验表明当拉绳
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2023-03-09更新
|
866次组卷
|
2卷引用:安徽省黄山市2022-2023学年高二上学期期末数学试题
名校
10 . 如图,四棱锥
中,底面ABCD是直角梯形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/04e1bf90-1acb-4fbd-ad10-c127bda39e72.png?resizew=186)
(1)求证:
平面ABCD;
(2)设
,当平面PAM与平面PBD夹角的余弦值为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d911eda6c5f21fc1bbbf505ec5b4a34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a69a02987e843691859d1b36f20a57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9425630dcfe5a824c44904d4f71e13.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/04e1bf90-1acb-4fbd-ad10-c127bda39e72.png?resizew=186)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/399cf3d3c84b9ba244d026e35dbd1880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e468f168f3657d84d44be5eb89a62d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2022-11-16更新
|
1741次组卷
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11卷引用:湖北省七市(州)教研协作体2021届高三下学期3月联考数学试题
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