如图,已知正四棱柱
的底面边长是3,体积是45,M,N分别是棱
、
的中点.
(1)求过
,
,
的平面与该正四棱柱所截得的多面体
的体积;
(2)求直线
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/19/6b81e8f1-05ed-4e53-aff1-ee0a715ff94b.png?resizew=154)
(1)求过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26897ec100620298705c525bb9e0cc5.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
2023高二·上海·专题练习 查看更多[4]
(已下线)第3章 空间向量及其应用(基础、常考、易错、压轴)分类专项训练(原卷版)(已下线)高二下期末真题精选(易错60题45个考点专练)(高中全部内容)(原卷版)(已下线)专题突破卷19传统方法求夹角及距离-1(已下线)专题08多面体与旋转体(2个知识点3种题型1种高考考法)-【倍速学习法】2023-2024学年高二数学核心知识点与常见题型通关讲解练(沪教版2020必修第三册)
更新时间:2023-08-17 22:12:41
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解题方法
【推荐1】(1)如图,直三棱柱,高为6,底边三角形的边长分别为3、4、5,以上下底面的内切圆为底面,挖去一个圆柱,求剩余部分几何体的体积.
(2)在底面半径为2,高为
的圆锥中内接一个圆柱,且圆柱的底面积与圆锥的底面积之比为1:4,求圆柱的体积.
(2)在底面半径为2,高为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/aa5364d4-8b3b-48e0-b328-3fc48d0317f2.png?resizew=130)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/205c0814-082c-4309-b171-20bbb952b5af.png?resizew=104)
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【推荐2】在一个圆锥内作一个内接等边圆柱(一个底面在圆锥的底面上,且轴截面是正方形的圆柱),再在等边圆柱的上底面截得的小圆锥内做一个内接等边圆柱,这样无限的做下去.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/cc8b0e3d-0315-43d4-8340-9eed3f39a9e4.png?resizew=171)
(1)证明这些等边圆柱的体积从大到小排成一个等比数列;
(2)已知这些等边圆柱的体积之和为原来圆锥体积的
,求最大的等边圆柱的体积与圆锥的体积之比.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/cc8b0e3d-0315-43d4-8340-9eed3f39a9e4.png?resizew=171)
(1)证明这些等边圆柱的体积从大到小排成一个等比数列;
(2)已知这些等边圆柱的体积之和为原来圆锥体积的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b37b8b12598827f31495b3182337167.png)
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【推荐1】如图,在半圆柱
中,
为上底面直径,
为下底面直径,
为母线,
,点
在
上,点
在
上,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/8f3e1215-e203-4b18-82fa-57897faa01af.png?resizew=143)
(1)求三棱锥
的体积;
(2)求直线
与直线
所成角的余弦值;
(3)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5db40c0ad940125cb88c967bb5a92b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf074a3b5ab2f3ef3d4d80f1173e0384.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/8f3e1215-e203-4b18-82fa-57897faa01af.png?resizew=143)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345b2127c265a8caf88f254cc51d16cd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0cc1f539db722b39ce1013eb52b7449.png)
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【推荐2】如图,三棱锥
中,点
在平面
的投影为点
,
,
,点
分别是线段
,
的中点,点
在线段
上.
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724317606764544/2726332800663552/STEM/ca3f3ffb-8256-4839-80e6-297b1897b28e.png?resizew=246)
(1)若
,求证:
;
(2)若
平面
,求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91b2f1719b081357ea38cf47653592a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e45142459df2244062cdc856b012a8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fddbb7f29e8672f34941fe70b0a1e45f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724317606764544/2726332800663552/STEM/ca3f3ffb-8256-4839-80e6-297b1897b28e.png?resizew=246)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a606499df4459e5fbd6021c61a805359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f986d7dffcd6a92bbfeedcc60a0620ca.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cbc7987494d031e1d051da8e5282522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc6f6dfdbe7d39891c35f67e1a95c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31bb8f443480c2d391a145377e212d70.png)
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【推荐1】如图,在四棱锥
中,底面ABCD为菱形,
,
,
°.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/c1349446-e6a0-4ef6-9d3f-d1d0c5f733f8.png?resizew=220)
(1)设P在平面ABCD内的射影为Q,证明:
;
(2)若
,求直线PC与平面PAD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36e2bb83427181e4cdb1bf38776be55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/c1349446-e6a0-4ef6-9d3f-d1d0c5f733f8.png?resizew=220)
(1)设P在平面ABCD内的射影为Q,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdede8f36225186fdb4a3a2dd1619e24.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eb26a1177e541c9c4916336ef1efc54.png)
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【推荐2】如图1,正方形ABCD中,E,F分别为边BC,AD的中点,将四边形EFDC沿直线EF折起,使得平面
平面ABEF.如图2,点M,N分别满足
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982337126260736/2984282999488512/STEM/bf8fa4ef-f995-41d7-aa2d-8cf8e06a94aa.png?resizew=370)
(1)求证:
平面BMN;
(2)求平面AFM与平面BMN夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9b8345fc4d52e1a9377cf98b429be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7735eeeba8e3fe00e3fb401ffe449ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9845a524b0eecc42b50b3760d0fb4976.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982337126260736/2984282999488512/STEM/bf8fa4ef-f995-41d7-aa2d-8cf8e06a94aa.png?resizew=370)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7c261740ac2ae26715e1298ca278a2.png)
(2)求平面AFM与平面BMN夹角的余弦值.
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【推荐3】如图,多面体
中,四边形
是正方形,四边形
为直角梯形,
,
,
,
为
上一点,且
.
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a685fd7539b94dcede33055ef3b0e340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02b1139e07e431b5d4276757b232bad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6bcf7a81baf90480b616b9a5fde3493.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f723850c512ee4df6ea48ff2c38ff6b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c16aa31938679a9ee9686ae46409b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdec00111d2d349c34dd63184c752b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335187895f612ce811414cfbedf89467.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea525564975bca3c35b6ca1d89e0cd40.png)
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【推荐1】如图,四棱锥
的底面是梯形,
,
,
,
平面
,
.
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若二面角
的大小为
,求
与平面
所成的角的大小.(结果用反三角函数值表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.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/9d50a68fed1c23837d1267bdda5c1962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
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【推荐2】如图,在棱长为2的正方体
中,
是
的中点,
![](https://img.xkw.com/dksih/QBM/2021/4/11/2697654008971264/2824133951291392/STEM/1e030125bdb9447a973fc55b22e196df.png?resizew=254)
(1)求直线
与平面
所成角的余弦值;
(2)求三棱锥
的体积.
![](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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/2021/4/11/2697654008971264/2824133951291392/STEM/1e030125bdb9447a973fc55b22e196df.png?resizew=254)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dc61d5de97b5a40be925b278ae494c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11990928efcd42ebe7a82a5f1105a708.png)
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【推荐3】如图
是由两个三角形组成的图形,其中
,
,
,
.将三角形
沿
折起,使得平面
平面
,如图
.设
是
的中点,
是
的中点.
与平面
所成角的大小;
(2)连接
,设平面
与平面
的交线为直线
,判别
与
的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1527ab37e0ce210fac7fa0164afde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43fcce40446633bf9e0b7a9acf58052.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb90428135c2058f07e2c798f71b5b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f493fa40faff9c21b7aedca05de9379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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