解题方法
1 . 如图所示,在多面体
中,四边形
是边长为
的正方形,其对角线的交点为
,
平面
,
,
,点P是棱
上的任意一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/b159782d-9ba7-473c-9644-4510bbd17941.png?resizew=124)
(1)求证:
;
(2)求直线
和平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee947130b72cccc577463e7c3d6e46f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6da9f598fecf6fcf41cd65b45cbe08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1f311d2cb28852f10d02cf44062da7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae5c7429c4e1c1151097452b9852ae44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/b159782d-9ba7-473c-9644-4510bbd17941.png?resizew=124)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b154270249b0ef54ddb26137b2681a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167d31eb8432b5c0364316e5048c23dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
您最近一年使用:0次
2 . 如图,四边形
为矩形,平面
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/46fd5add-a915-4ad5-ae14-43d9b7e7f6d6.png?resizew=155)
(1)求证:
;
(2)点
在线段
上,
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a4e3f0349fa83dc2a0b7d798f04843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48d40c1ffb92f0207c8bdef7654b710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/783a833992e0862211a15fec2d3e3dda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68004768b879c6a052f45a2c45217cd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/46fd5add-a915-4ad5-ae14-43d9b7e7f6d6.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589ddae20626f9aaac616d2a3b5d95bd.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ed51f2e03c919f68d391e16fb18b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf2f0df53aa68c9c334165034788166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2db1674add0f4a1a24f5ed893b1c5d0.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,
底面
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/5fe10bb2-f21d-416e-a3ef-1dca75d4f279.png?resizew=129)
(1)求证:
;
(2)若平面
与平面
夹角的余弦值为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5acb763021bf166ca719d07223591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a93f5289c1483bc39b0125fdc8dd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be41b05e11ba5eadaaed9a224b949774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f391256e25577a7bdaf8289bb52827f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/14/5fe10bb2-f21d-416e-a3ef-1dca75d4f279.png?resizew=129)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530f462e5ec1e58c46e1f7644d0cc21.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd4e447289888d9af05eb91a8af9581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d492a2248463e0c0199a25d0f76d23.png)
您最近一年使用:0次
2024-02-14更新
|
258次组卷
|
2卷引用:河北省唐山市2024届高三上学期期末数学试题
解题方法
4 . 已知
,M为平面ABC外一点,
,点M到
两边
的距离均为
,那么M到平面ABC的距离为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a437beb9a4f71a71a5e5418185aada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
解题方法
5 . 如图,在四棱锥
中,
底面
,底面
是直角梯形,
,
,
点在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/152e4b02-5d84-43bb-87aa-aa67046eb860.png?resizew=154)
(1)求证,平面
平面
;
(2)若直线
与平面
所成的角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ff6d7dd48b57f03d82d2c522ee9b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b4dda2be941a16fdfe67ac9aa90298.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/45ab1959f7fa560977ffb9fb0e11bb2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/152e4b02-5d84-43bb-87aa-aa67046eb860.png?resizew=154)
(1)求证,平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8981acad5791c9037b86779e4d8323.png)
您最近一年使用:0次
名校
解题方法
6 . 如图所示,在三棱锥
中,侧棱
底面ABC,
,M为棱PC的中点,N为棱BC的上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/b114d64a-c91f-42ea-90ef-0897c63be54a.png?resizew=121)
(1)求证:
.
(2)若二面角
的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58eea4128f9dc8aa589cdb1e20f3a615.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/13/b114d64a-c91f-42ea-90ef-0897c63be54a.png?resizew=121)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0efbdc4cbc82cc55bed9905f81fbfc2.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fb3c575a50f550e8ff6efd812768b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d2fea3ab80d17eb83dd1189ca6d78e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83a3fa8e06238d44bf37b027f0fca62d.png)
您最近一年使用:0次
7 . 如图,在等腰梯形ABCD中,
面
,
面
,
,点P在线段EF上运动.
;
(2)是否存在点P,使得平面PAB与平面ADE所成二面角余弦值为
,若存在,试求点P的位置,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62205a19068497616880dc2314c34b62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0150b31a043805bfaa407be3162002ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8455347237248c7701100642c5b119.png)
(2)是否存在点P,使得平面PAB与平面ADE所成二面角余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013552105bb2e358f80cd9585b60e829.png)
您最近一年使用:0次
解题方法
8 . 如图,在等腰梯形ABCD中,
面ABCD,
面ABCD,
,点P在线段EF上运动.
;
(2)是否存在点P,使得
平面ACE?若存在,试求点P的位置,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04bd1c6c85b403486baad2162ad9aa7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0150b31a043805bfaa407be3162002ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8455347237248c7701100642c5b119.png)
(2)是否存在点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
您最近一年使用:0次
9 . 如图,在棱长为2的正方体
中,点
是棱
上的动点.
;
(2)若点
是棱
的中点,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](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/31b30478b45ea023eb5d23805aadf709.png)
(2)若点
![](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/dee31a4af85968dc63bd86a779a77d34.png)
您最近一年使用:0次
2024-02-12更新
|
189次组卷
|
2卷引用:上海市新川中学2023-2024学年高二上学期期末数学试题
名校
10 . 如图,三棱柱
的侧面
和
均为正方形,
,
交
于点O,D为
中点,
.
;
(2)设
,当
为何值时,平面
与平面
夹角的余弦值等于
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d79c23a0ec10057f105624d2992ad60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/820567942aa98b2feaaa017fcb7790df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
您最近一年使用:0次
2024-02-12更新
|
103次组卷
|
2卷引用:河北省唐山市2023-2024学年高二上学期期末考试数学试题