如图,在三棱锥中,
,
,
分别为
,
的中点,
.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f405ee31b17b3cdccee05fd06f6562.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03709303b4ca3bfa1aa174d9ce2e683e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4193a34cda561b6404996e8050d404af.png)
23-24高三上·江西南昌·开学考试 查看更多[5]
江西省南昌市2024届高三上学期摸底测试数学试题河北省唐县第一中学2023-2024学年高二上学期第一次考试(9月)数学试题广东省广州市第十六中学2024届高三上学期教学质量检测(一)数学试题河南省信阳市固始县高级中学第一中学2023-2024学年高二上学期第一次月考数学试题(已下线)通关练06 空间向量与立体几何章末检测(一)- 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
更新时间:2023-09-09 16:49:10
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解答题-证明题
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解题方法
【推荐1】如图,在四棱锥E-ABCD中,平面
平面ABCD,四边形ABCD为矩形,
.
![](https://img.xkw.com/dksih/QBM/2020/4/5/2435068035448832/2435859025526784/STEM/88a052a5b0b540feb5c3a8df7190d4af.png?resizew=136)
求证:(1)直线
平面EBC;
(2)直线
平面EBC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde1e200d1dd5ddc433c876c9d2f688c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bbf6796681347c82b07c4dd30800f1a.png)
![](https://img.xkw.com/dksih/QBM/2020/4/5/2435068035448832/2435859025526784/STEM/88a052a5b0b540feb5c3a8df7190d4af.png?resizew=136)
求证:(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5edfe97aeab0cf16b40fa9d2e15f9e.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed04b01505bbd8a4ac0bc12e46f23bf6.png)
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解题方法
【推荐2】如图,在四棱锥
中,底面
是正方形,侧棱
底面
,点E,F分别是
,
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/28b8f344-ece6-4de9-ba94-085ac2e81e36.png?resizew=142)
(1)求证:
平面
;
(2)若
,且PC与底面ABCD所成角的正弦值为
,求平面AEC与平面
夹角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/117878cbd8c00f2aabcdf62b487e2dc7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/28b8f344-ece6-4de9-ba94-085ac2e81e36.png?resizew=142)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/351f24c3c3f745cb07320d7491916b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
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【推荐1】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)
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【推荐2】如图所示,EB垂直于菱形ABCD所在平面,且EB=BC=2,∠BAD=60°,点G、H分别为边CD、DA的中点,点M是线段BE上的动点.
(I)求证:GH⊥DM;
(II)当三棱锥D-MGH的体积最大时,求点A到面MGH的距离.
(I)求证:GH⊥DM;
(II)当三棱锥D-MGH的体积最大时,求点A到面MGH的距离.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/357b9ba1-930e-4f65-975f-54954172c955.png?resizew=230)
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【推荐3】如图,四棱锥
的顶点P在底面ABCD上的射影为AB的中点H,
为等边三角形,
,
,棱BC的中点为E.
(1)证明:
;
(2)若
,求直线PE与平面PBD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15416b74b2ecbcfa38cf34a9ffff730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/17/b25d67a9-eb5f-4539-adf4-9dadbb2f9ca0.png?resizew=139)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0180a58a753fced571fc00f0bee8ff0d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5221356c18ad2e4e7bf360def5345b.png)
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【推荐1】《九章算术》是我国古代内容极为丰富的数学名著,书中将底面为直角三角形的直棱柱称为堑堵,将底面为矩形的棱台称为刍童.在如图所示的堑堵
与刍童
的组合体中
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/801d7f13-23c7-4df2-8b01-82c2c53e9bcb.png?resizew=207)
(1)证明:
平面
;
(2)若
,
,
,三棱锥
的体积为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d762c010dbf90d25bb4b72c849db3e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56862f9a75ba084f3ddb81aa130d5685.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/801d7f13-23c7-4df2-8b01-82c2c53e9bcb.png?resizew=207)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0b006143c991165cd8c9f6fe11831b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3acdab98dbc9b6c859bfe0f12d4556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac20024c3622b78dfaa2f4ef75714dee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54d6f331f6cf759bd0cd2edbc809e875.png)
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【推荐2】在四棱锥
中,底面ABCD为梯形,
,
,
,侧棱
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981294350090240/2981376688447488/STEM/310a3fde-4b5c-4ac3-8fa6-1c49e9853972.png?resizew=153)
(1)求证:
底面
;
(2)求平面
与平面
所成的锐二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae139b51956b9281d73d9ba82b875e46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/711260c44fc23cb90004294e6291bbcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71826134c3080aa75becc655a9089855.png)
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981294350090240/2981376688447488/STEM/310a3fde-4b5c-4ac3-8fa6-1c49e9853972.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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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【推荐3】如图,在平行四边形
中,
,
,
,四边形
为矩形,平面
平面
,
,点
在线段
上运动,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/f22ae8cd-bc96-4371-8475-0ad0fd931752.png?resizew=177)
(1)当
时,证明
;
(2)设平面
与平面
的夹角为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/695525d00319665b1ad0d01717979523.png)
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc39144b305c67d44410d41053a1d28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/897ada25cb0f758422a2601f8709b821.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/f22ae8cd-bc96-4371-8475-0ad0fd931752.png?resizew=177)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fceab837209b0fd306dd7ff1381e6e7.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2730b513bd3359c3dfe6567e04f5ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2977ae4bfa32de8c6f0fb136205c4fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b8b77522dfc890b99f0a86a690de94.png)
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