如图四棱锥
,点
在圆
上,
,顶点
在底面的射影为圆心
,点
在线段
上.
(1)若
,当
//平面
时,求
的值;
(2)若
与
不平行,四棱锥
的体积为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68b96377a7555948386c5501be797f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/4/b00b11ca-ccb9-4e58-b057-5959e9e71bc8.png?resizew=208)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357574d7e0c53a779539efa8ee7898d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8246ca2f911c5883749db3a4afcbd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
22-23高二下·浙江金华·期末 查看更多[2]
浙江省金华十校2022-2023学年高二下学期期末联考数学试题(已下线)第一章 空间向量与立体几何(知识归纳+6类题型突破)-2023-2024学年高二数学单元速记·巧练(人教A版2019选择性必修第一册)
更新时间:2023-07-01 08:49:58
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图:五面体
,四边形
是矩形,
是正三角形,
,
,
是线段
上一点,直线
与平面
所成角为
,
平面
.
![](https://img.xkw.com/dksih/QBM/2017/3/10/1640766102274048/1641396315676672/STEM/ec9a44cb4c0f41a2a7dd18e0d75a8594.png?resizew=163)
(1)试确定
的位置;
(2)求三棱锥
的体积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
![](https://img.xkw.com/dksih/QBM/2017/3/10/1640766102274048/1641396315676672/STEM/ec9a44cb4c0f41a2a7dd18e0d75a8594.png?resizew=163)
(1)试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b67046592a3153a442165064287fcf.png)
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解题方法
【推荐2】如图,三棱柱
的所有棱长都是3,
面
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/2266c4d7-df96-471d-be30-d2cc736521a9.png?resizew=214)
(1)求证:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/2266c4d7-df96-471d-be30-d2cc736521a9.png?resizew=214)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4305d8d52fe2cc79c78129652e64bb62.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d0b161329b308aee49066af460968a.png)
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【推荐1】如图,
是平行四边形,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/b16b2259-2bb0-41ff-9909-065035077d69.png?resizew=134)
(1)求证:
平面
;
(2)求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95475bfc06e884754eb4a455c3f434e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a146d4e886817fdeecba419b3692e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b5d2943803894bc5d204e75e2d172b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f04edd173055da613832b187737ce4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d31430a87a688a727b86e4001dcb3e6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/b16b2259-2bb0-41ff-9909-065035077d69.png?resizew=134)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/871221c3eaabb6d9b030ce91c7139709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffc3552dd835a9ee6022bb11397a1bd.png)
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【推荐2】如图,在直三棱柱
中,
分别为
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2019/1/18/2121620383735808/2124850751283200/STEM/b4a203befcdb4300b93967fc5b8faf75.png?resizew=118)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ea285e96bf2e3b6406151bb694f10a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3e8d881d96688ea15a868bb5a39f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d355b4c58b4e883b9e65cc6da8622e.png)
![](https://img.xkw.com/dksih/QBM/2019/1/18/2121620383735808/2124850751283200/STEM/b4a203befcdb4300b93967fc5b8faf75.png?resizew=118)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0447e46f2d9b39960ae1f1294ed8a2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cf316559a3cc043ae9254550bce36c1.png)
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【推荐3】如图,P为圆锥的顶点,O为圆锥底面的圆心,AB为底面直径,四边形POBC是梯形,且
,
,
,D为圆O上一点.
(1)若点M在线段AD上,且
,求证:
∥平面CDB;
(2)当直线PD与平面PAB所成的角为30°时,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061248f4e3932ad43c1abd52ada56a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b93b8e3f2196f571782a283f2e10ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d3530ee12bd68b53970b83f28985b31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/9/b1f43728-6dfd-4cfb-9393-8828e4fb8ffa.png?resizew=168)
(1)若点M在线段AD上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963f0cda34e54f15725cee9448a4537e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
(2)当直线PD与平面PAB所成的角为30°时,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6a0cee8226e82cc57916e10d533369.png)
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【推荐1】如图,在三棱台
中,
,
,
,G、H分别为AC、BC上的点,平面
平面
.
(1)求证:
平面
;
(2)若
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee170c82e3dc624dc3016443496a469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9025d51ecc5739700eb73fc44a46a056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a5831bd2d949ed609b0f0fd68d0729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/37c4c7b1-2622-4a55-86b7-123f68901aef.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b6917095bea8efd3154b72d737f013.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f76925ed99b7172956319974258a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430e2c266987203c2982b09f0ae70551.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccde4dea1724ba95628c87e0990865d2.png)
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【推荐2】一装有水的直三棱柱ABC-A1B1C1容器(厚度忽略不计),上下底面均为边长为5的正三角形,侧棱为10,侧面AA1B1B水平放置,如图所示,点D、E、F、G分别在棱CA、CB、C1B1、C1A1上,水面恰好过点D,E,F,C,且CD=2
![](https://img.xkw.com/dksih/QBM/2018/2/22/1888005674598400/1892826472972288/STEM/83b43cf64eca40b4b6bb3fbce32a3fe8.png?resizew=323)
(1)证明:DE∥AB;
(Ⅱ)若底面ABC水平放置时,求水面的高
![](https://img.xkw.com/dksih/QBM/2018/2/22/1888005674598400/1892826472972288/STEM/83b43cf64eca40b4b6bb3fbce32a3fe8.png?resizew=323)
(1)证明:DE∥AB;
(Ⅱ)若底面ABC水平放置时,求水面的高
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【推荐1】如图,在几何体
中,四边形
为平行四边形,且平面
平面
,
,
,且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570751238987776/1570751244460032/STEM/b6645538-fe21-4ab4-a3ae-21ec8c93c99d.png?resizew=330)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92614f668e931b43b57fd46c79dd06d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570751238987776/1570751244460032/STEM/b6645538-fe21-4ab4-a3ae-21ec8c93c99d.png?resizew=330)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
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【推荐2】如图,在三棱锥
中,底面
是等腰直角三角形,
,
,且
,
为
的中点.
平面
;
(2)若二面角
的大小为
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc223bc59d4c5b1c99f811e4bded9783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc83f34b5a3c1dc09d990ce4bdc8e078.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d1c5eace748465b2dad5065f5111c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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名校
【推荐3】如图,在四棱锥
中,底面
为正方形,
,
平面
,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/311d925a-4949-4714-8fa6-dd86deb89c21.png?resizew=119)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值;
(3)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/9300bfac2806ffc211a19d9b7317e9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/311d925a-4949-4714-8fa6-dd86deb89c21.png?resizew=119)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588690c4a218025937357ffab8d63c7a.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588690c4a218025937357ffab8d63c7a.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae68b15be784a6fa7a62897badf67f27.png)
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