1 . 在三棱锥
中,M是线段
的中点,
,
,
,
.
(1)证明:P在平面
内的射影O为
的垂心;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb3735a467f788624fe63946e0da5b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fe75f967e8915c9124a5d4ac420a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c327b3e91d8bea53255d9308a952a276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827c7d9ca8f0e06a09bd37e930b3c3ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/29/d44cbe49-473b-42e9-a1e4-0a171e6be968.png?resizew=156)
(1)证明:P在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
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解题方法
2 . 如图,圆锥的高
,底面直径
是圆
上一点,且
,若
与
所成角为
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/7082b9a4-b79e-4215-9cfe-c15d28c9ff3d.png?resizew=122)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f798d6f25c170205fadc3fa6ac7ea04e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6fb5c6062dfb64dce099b36f07adcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c96b8d433bd26c3909efbba0fb6401.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/23/7082b9a4-b79e-4215-9cfe-c15d28c9ff3d.png?resizew=122)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-03-11更新
|
891次组卷
|
3卷引用:黄金卷06(2024新题型)
名校
3 . 已知
(a,
)是直线l的方向向量,
是平面
的法向量,如果
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dfc3b155435130b8c1d0e66484a4727.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8752ee706196b497099ddd8342ef3e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3849dacb9cd91d905551d858ffdd5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c656aab9776eff87154d726241066459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e380108ba2cf04e68a5a9393d2b921c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dfc3b155435130b8c1d0e66484a4727.png)
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解题方法
4 . 如图,在
中,
,
,
.将
绕
旋转
得到
,
分别为线段
的中点.
到平面
的距离;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/984b80660410b1d9a3bd0f607c01f924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9774f83067ed956a551bc41adcce0469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e671ec69011d5d368791070e722d832b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b4dcc093218443f71a046b6df94bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3877c5dd48bc7311f79a38de74a6cab4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18e1963fd5895e9aef6263dbc153727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415440adb63f3bc728ae315b5d77ce4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
您最近一年使用:0次
2024-03-07更新
|
424次组卷
|
6卷引用:湖北省鄂西南三校2023-2024学年高二下学期三月联考数学试卷
名校
解题方法
5 . 在正四棱柱
中,
分别是
的中点,
是棱
上一点,则下列结论正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/bfa724b9-5af6-4a17-97d9-6e110d68c6ad.png?resizew=168)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2da442b4344232f22b3accb782eec487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e443eab1bfe20ca45ca55170c3901142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/bfa724b9-5af6-4a17-97d9-6e110d68c6ad.png?resizew=168)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
2024-03-03更新
|
342次组卷
|
3卷引用:湖北省十堰市2023-2024学年高二上学期期末调研考试数学试题
名校
解题方法
6 . 在四棱锥
中,底面
是正方形,若
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/67642a9b-67e9-4804-bf7a-bb6cc83b8471.png?resizew=152)
(1)求证:平面
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c6caa0455442437177ab9b995df37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a3d0f667ef7ca851f514f2e742a8624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a512bcb83a2e952d2f1f877f1ceaa5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/2/67642a9b-67e9-4804-bf7a-bb6cc83b8471.png?resizew=152)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb11df029afb11e4233989b1338cb3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64484f96568410926e0c50898eba6e32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c92ee8494e400263e2f0effabf573f.png)
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解题方法
7 . 在棱长为2的正方体
中,点P满足
,
、
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6168a14ce666e3212158413e428f34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e2e01346f60857ff635bb766802e57.png)
A.当![]() ![]() ![]() |
B.当![]() ![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() ![]() |
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8 . 如图,在四棱锥
中,
,
,底面
是直角梯形,
.
(1)求证:
;
(2)求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7fca40920c70c01c551e83d61e69b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e1b638760d907efe836500581da1596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86756f44de592bdb3d29b96eb75c31d2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/67688748-00c3-4473-83dc-38da262af2e4.png?resizew=151)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4125524caac016727c80d2722c5ba3.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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解题方法
9 . 如图,在五面体
中,面
为矩形,且与面
垂直,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/c7b39615-7623-4380-a88b-8691b21aa2bd.png?resizew=136)
(1)证明:
//
;
(2)求平面
与平面
夹角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3bbe4cdd2c154bd9a8073b0d4cecb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75da7d6d75e39aa967b7c477aa1d60d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb55961fe96e155242d18d98e5c2261.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/27/c7b39615-7623-4380-a88b-8691b21aa2bd.png?resizew=136)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
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解题方法
10 . 已知空间向量
,
,则B点到直线
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9667d1701d24939ca4c7e4f40435d581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d00fc9e891d8b3ac24845ded91f6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次