如图所示,已知
平面ACD,
平面ACD,
为等边三角形.
,F为CD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/e0004eda-022b-4ebf-8ca7-b85689d44603.png?resizew=153)
(1)证明:
平面BCE;
(2)证明:平面
平面CDE;
(3)求直线AD和平面BCE所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb59a3752da728cfa77557dd14d0f737.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/e0004eda-022b-4ebf-8ca7-b85689d44603.png?resizew=153)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d46554105150391e671609fc6348a18.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
(3)求直线AD和平面BCE所成的角的正弦值.
21-22高一下·江西上饶·期末 查看更多[5]
江西省上饶市六校2021-2022学年高一下学期期末联考数学试题安徽省滁州市定远县民族中学2021-2022学年高一下学期期末考试数学试题(已下线)专题四 期末高分必刷解答题(32道)-《考点·题型·密卷》(已下线)模块四 专题3 期末重组综合练(江西)安徽省阜阳市颍上第一中学2023-2024学年高二上学期开学考试数学试题
更新时间:2022-07-02 12:53:15
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相似题推荐
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在三棱柱
中,侧面
是矩形,平面
平面
,
是棱
的中点.
,
.
![](https://img.xkw.com/dksih/QBM/2020/8/2/2519321075630080/2520053761605632/STEM/df64e61d80d547f19d84fb0a5c9f8b04.png?resizew=292)
(1)求证:
;
(2)若
是
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b604db8b931f31b41273cdebee2ef119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93375ca41cdaac319b79f05108f7fc24.png)
![](https://img.xkw.com/dksih/QBM/2020/8/2/2519321075630080/2520053761605632/STEM/df64e61d80d547f19d84fb0a5c9f8b04.png?resizew=292)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37466666ac10bbcdfddb16030dd8e1e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa6d64d90b17044cb17ff3061420c08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770b4f16694b2bd79a1a93d776a82680.png)
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名校
解题方法
【推荐2】已知在四面体
中,
,
,点
,
,
,
分别为棱
,
,
,
上的点,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516895004139520/2517198065188864/STEM/ad7ee7ed-7445-491b-a382-77fb25468054.png)
(Ⅰ)当
时,求证:
平面
;
(Ⅱ)当
变化时,求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953b7b5c647641edbec4c2ab90a65f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8361ee004d1e0716806b41a637a09c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cccb4b70dda48486aa453b3be6da9b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eaba3121781cfb64ca946987ffef383.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e83b56388e7b274a3fcf74cd74f6ca.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516895004139520/2517198065188864/STEM/ad7ee7ed-7445-491b-a382-77fb25468054.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1c3ea872a20fdc1843cb5ffce8a554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f33fa5152ba27f7b8a28890cefca219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
(Ⅱ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb5012f6c70a1e98d682b6d021fadd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
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【推荐3】如图,在四棱锥
中,
,
是
中点.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987629425745920/2987960304844800/STEM/ea5e5d66-d994-4311-a364-7844792c5616.png?resizew=217)
(1)证明:
平面
;
(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/cee7ce52d47eef3d64d90b1b061a709c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ca5dceb739457ea9ad9ac3fee74c50b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987629425745920/2987960304844800/STEM/ea5e5d66-d994-4311-a364-7844792c5616.png?resizew=217)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba8f7af0e091e082100c3cd7f8c487f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
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【推荐1】已知平行四边形
中
,
,平面
平面
,三角形
为等边三角形,
,
.
,
分别为线段
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/2a6fbc0d-8524-4baa-b380-7ab08c5f9464.png?resizew=271)
(1)求证:平面
平面
;
(2)求证:平面
平面
;
(3)求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec43f7352b3a8c194b4c37485fb4ffd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d3f7d55fcbaebc4e2450ac63a3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4901a7eda97d6a307db76c4fb196ba3d.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/2a6fbc0d-8524-4baa-b380-7ab08c5f9464.png?resizew=271)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea0d020a24cd4b60f858f3ff09da3bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f3e3f310f6ec3f3a26498e7ee17a00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐2】如图,在四棱锥
中,
是等边三角形,
平面
且
为
中点.
![](https://img.xkw.com/dksih/QBM/2021/2/22/2663757255909376/2664796301451264/STEM/3ae447b9-e186-427d-9f0a-6e68dd96f0c1.png)
(1)求证:
平面
;
(2)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/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0787d2cb66d00c49d3348b52acd407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8ea177384430808067769d5ebbbb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613354053d19e4919e68e30a224c6f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2021/2/22/2663757255909376/2664796301451264/STEM/3ae447b9-e186-427d-9f0a-6e68dd96f0c1.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
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【推荐3】《九章算术》中,将底面为长方形且有一条侧棱与底面垂直的四棱锥称之为阳马,将四个面都为直角三角形的四面体称之为鳖臑.在如图所示的阳马
中,侧棱
底面
,且
,点
是
的中点,连接
、
、
.
![](https://img.xkw.com/dksih/QBM/2021/5/28/2731012158947328/2800140944449536/STEM/643da5e3-0dc7-4a32-9ef7-6acf92cc543f.png?resizew=265)
(1)证明:
平面
;
(2)若四边形
是正方形,求直线
与平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/a5e84a62b385350e02a534046d6acf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2021/5/28/2731012158947328/2800140944449536/STEM/643da5e3-0dc7-4a32-9ef7-6acf92cc543f.png?resizew=265)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图所示,在多面体ABCDEF中,四边形ADEF为正方形,AD∥BC,AD⊥AB,AD=2BC=1.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/b127b727-47e6-4796-a253-36181d953c8e.png?resizew=159)
(1)证明:平面ADEF⊥平面ABF.
(2)若AF⊥平面ABCD,二面角A-BC-E为30°,三棱锥A-BDF的外接球的球心为O,求二面角A-CD-O的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/b127b727-47e6-4796-a253-36181d953c8e.png?resizew=159)
(1)证明:平面ADEF⊥平面ABF.
(2)若AF⊥平面ABCD,二面角A-BC-E为30°,三棱锥A-BDF的外接球的球心为O,求二面角A-CD-O的余弦值.
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解答题-证明题
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适中
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解题方法
【推荐2】如图,在四棱锥S—ABCD中,
底面ABCD,底面ABCD是矩形,且
,E是SA的中点.
(1)求证:平面BED
平面SAB;
(2)求平面BED与平面SBC所成二面角(锐角)的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab3cc5d6891b01c98e1429da8a58d4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e255853b0fe064f04527b9fc89fee4.png)
(1)求证:平面BED
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4237f6a1fc115bb790aa10704b7908c3.png)
(2)求平面BED与平面SBC所成二面角(锐角)的大小.
![](https://img.xkw.com/dksih/QBM/2012/3/27/1570822019809280/1570822025379840/STEM/1c060e38e31b474895dca6bd79364525.png)
您最近一年使用:0次