如图,在四棱锥
中,
平面
,
,
是等边三角形,
.
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965732335583232/2968009211568128/STEM/b62fd0274993470b835591c6d53dd4ff.png?resizew=202)
(1)若
,求证:
平面
;
(2)若二面角
为30°,
,求直线
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f09ad78d4eccd1a9c9ccd3c4af79c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965732335583232/2968009211568128/STEM/b62fd0274993470b835591c6d53dd4ff.png?resizew=202)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/816b7f285cc55bbe5bf873538ba87230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065f2c3527fcc9d84939c47ac8640643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
2022·山东聊城·二模 查看更多[3]
山东省聊城市2022届高三下学期二模数学试题重庆市缙云教育联盟2022届高三下学期第三次诊断性检测数学试题(已下线)考点17 点、直线、平面之间的位置关系-2-(核心考点讲与练)-2023年高考数学一轮复习核心考点讲与练(新高考专用)
更新时间:2022-04-28 18:13:06
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,长方体
中,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/b7c2b5c9-56cb-49de-a1f9-5e4e81e8a988.png?resizew=150)
(1)求证:直线
面
;
(2)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52ba95a39d97385ac6835b25ddabe6b.png)
(3)求二面角
的余弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/b7c2b5c9-56cb-49de-a1f9-5e4e81e8a988.png?resizew=150)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16f7f44fa920f5758bc72b182ac9d181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e48e2f18c4c61dfcc908827ac3c8a204.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52ba95a39d97385ac6835b25ddabe6b.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a175800417614231410d9c86a9c21591.png)
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适中
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名校
【推荐2】在四棱锥
中,四边形
为平行四边形,三角形
为等边三角形,已知
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/7/2/2497220293828608/2498419685146624/STEM/9b8a1893-203d-4186-becc-0d1961f01f82.png?resizew=313)
(1)求证:
(2)求直线
与面
所成的角的正弦值.
![](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/745e0525a41fe2e2a7739c75a942290b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ee7262d0b5cbbade014e07e7373501.png)
![](https://img.xkw.com/dksih/QBM/2020/7/2/2497220293828608/2498419685146624/STEM/9b8a1893-203d-4186-becc-0d1961f01f82.png?resizew=313)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93380ab8eccc6e6f11bdf19ffc2d4cd0.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在多面体
中,四边形
是菱形,
,
平面
,
,且
.
![](https://img.xkw.com/dksih/QBM/2022/5/5/2973045818130432/2974755261923328/STEM/0d2b4a33-9c8b-4868-b733-06bce35b409b.png?resizew=180)
(1)求证:
平面
;
(2)已知点G在CF上,当
时,求直线DG与平面BDE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e0bd4b30dc777ac9da80f6baa3eb31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751ecec223e69ea940ffe196aa1463ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6f8de258be700572aae2809ce43676a.png)
![](https://img.xkw.com/dksih/QBM/2022/5/5/2973045818130432/2974755261923328/STEM/0d2b4a33-9c8b-4868-b733-06bce35b409b.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429551ecb5930b2f033019e4d5b37ad7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)已知点G在CF上,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a987dd51f99d58c731c596c78dcd7e.png)
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,在四棱锥
中,底面
为矩形,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67fe8b526fd39c351d83a653fc118d79.png)
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/700c0ff9-fff3-42c2-ab8f-432ed711cae7.png?resizew=134)
(1)求直线
与平面
所成角的正弦值;
(2)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/67fe8b526fd39c351d83a653fc118d79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c644140eb9e0414d56ada52cc2a053f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a963e928622d36076f0f4bff784680.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/700c0ff9-fff3-42c2-ab8f-432ed711cae7.png?resizew=134)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281db65d019f6f77dc0dfcc675ce93d1.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3414816d67cfac6ab7312f44eec70cbf.png)
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