如图, 在四棱锥
中, 四边形ABCD是直角梯形,
平面ABCD,
,
∥
,
,点 E 是 PB 的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/acaedc57-dba5-4748-8493-c1eaf41070f7.png?resizew=156)
(1)证明: 平面
平面 PBC;
(2)若平面 PAD 与平面 ABCD 所成锐二面角的正切值为2,求直线PD 与平面ACE 所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9060f03b9ee41d70d135b1e1a8902ce9.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/f1bb22c636c01482c17db04a60e38c2f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/acaedc57-dba5-4748-8493-c1eaf41070f7.png?resizew=156)
(1)证明: 平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(2)若平面 PAD 与平面 ABCD 所成锐二面角的正切值为2,求直线PD 与平面ACE 所成角的正弦值.
23-24高三上·重庆·阶段练习 查看更多[3]
更新时间:2023-12-16 18:10:30
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,四棱锥
中,
底面
,底面
为直角梯形,
,
为
中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/c6fcd687-aefb-4e39-9771-3be2e78a0359.png?resizew=167)
(Ⅰ)求证:
底面
;
(Ⅱ)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1074c943acd591413af464a28c285f05.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/7/c6fcd687-aefb-4e39-9771-3be2e78a0359.png?resizew=167)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(Ⅱ)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6091b4635acf045f70c36c50bd256059.png)
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解题方法
【推荐2】如图,在正方体
中.
![](https://img.xkw.com/dksih/QBM/2021/2/27/2667045127626752/2669037615284224/STEM/38d69751-b94c-4319-8e9d-3a28d6812d6e.png)
(1)求证:平面
平面
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://img.xkw.com/dksih/QBM/2021/2/27/2667045127626752/2669037615284224/STEM/38d69751-b94c-4319-8e9d-3a28d6812d6e.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ec06379873dff127e6482d9ef638ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc5bef4c4586630701fae5fa141c8818.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d505a25cffb330f45978d8792bad2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f921b462ee12ad5749ea45d75f609b7.png)
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解答题-证明题
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适中
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【推荐3】如图,四边形
为正方形,
,
与
分别是
与
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/fce579e0-e71d-4cfa-9aeb-dde4bf6dcd58.png?resizew=148)
(1)求证:
平面
;
(2)求证:
//平面
;
(3)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad0ebbbd7b3d3f5bb5234641d0820d12.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/365822bd3945e6a3e871ca979c84cc12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/fce579e0-e71d-4cfa-9aeb-dde4bf6dcd58.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886fe246fc8dbff2f1b68834ddccf5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0215e13a9fb5574d5194aeb9507a98aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d2fbe9bde8c864496c6c0aad5a22bb7.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb029d909c056b1c98d114f2606deabf.png)
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【推荐1】如图所示,四棱锥
中,
、
分别为
、
中点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/1e4587a5-ac9e-4c06-b01e-9a638c790b81.png?resizew=185)
(1)若四边形
为菱形,证明:平面
平面
.
(2)若四边形
为矩形,
,
,四棱锥
的体积为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/1e4587a5-ac9e-4c06-b01e-9a638c790b81.png?resizew=185)
(1)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe88fb8bc8fe985cf2bb29003cc9111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98823cbc09ca52df1fbcc446eba3e44f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1065f63ef58e0e602ce2fd9432d9025.png)
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名校
解题方法
【推荐2】如图所示,在三棱锥
中,
面
,
,
,
,点
,
分别为棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/8a3b95e1-964f-45e5-9d0a-e86d363836f2.png?resizew=152)
(1)求证:面
面
;
(2)当
时,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3cc9cccfb4c260dac05f4ed57e8c10.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/8a3b95e1-964f-45e5-9d0a-e86d363836f2.png?resizew=152)
(1)求证:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
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解题方法
【推荐1】如图,正四棱锥
的高为
,体积为
.
(1)求正四棱锥
的表面积;
(2)若点
为线段
的中点,求直线AE与平面
所成角的正切值;
(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/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78f73abb3342bb2113768bfba1632ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/24/1233f996-5228-42ed-9bc1-2c13a5b539f8.png?resizew=159)
(1)求正四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
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解题方法
【推荐2】如图,在圆柱
中,矩形
是圆柱
的轴截面,点
在上底面圆周上(异于
,
),点
为下底面圆弧
的中点,点
与点
在平面
的同侧,圆柱
的底面半径为1,高为2.
![](https://img.xkw.com/dksih/QBM/2021/5/7/2716074366361600/2718189319757824/STEM/cadee712c9b54e929df53c4f0580b29e.png?resizew=151)
(1)若点
是圆弧
的中点,证明:平面
平面
;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://img.xkw.com/dksih/QBM/2021/5/7/2716074366361600/2718189319757824/STEM/cadee712c9b54e929df53c4f0580b29e.png?resizew=151)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6dd051db98c531f9ef18cdfd793f4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/058a5573886ea9039b78ebce21a90eb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】如图1,正方形
,
,延长
到达D,使
,M,N两点分别是线段
上的动点,且
.将三角形
沿
折起,使点D到达
的位置(如图2),且
.
![](https://img.xkw.com/dksih/QBM/2021/3/17/2680104915099648/2680395183456256/STEM/2d1ebee1-739d-496e-8c4a-295174659453.png)
(Ⅰ)证明:
平面
;
(Ⅱ)在线段
上确定点M的位置,使平面
与平面
所成角(锐角)的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0487ebca22d4aa1233073f81fd70a424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0a3fa475b24f57ecd79c681259561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29819c98ebd087116d5e579f4f088fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0650f430b90d7a6e906b7d16a18334.png)
![](https://img.xkw.com/dksih/QBM/2021/3/17/2680104915099648/2680395183456256/STEM/2d1ebee1-739d-496e-8c4a-295174659453.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91521c2bda415d826e71f2be4eabc7fe.png)
(Ⅱ)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc839fc1b9a5e589de35cf43cb70e0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
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【推荐2】如图所示,矩形ABCD和梯形BEFC所在平面互相垂直,
BE∥CF,∠BCF=∠CEF=90°,AD=
,EF=2.
(1)求证:AE∥平面DCF;
(2)当AB的长为何值时,二面角A—EF—C的大小为60°?
BE∥CF,∠BCF=∠CEF=90°,AD=
![](https://img.xkw.com/dksih/QBM/2010/3/31/1569681857101824/1569681933762560/STEM/1f55bace1e144bbfa002cad645138eee.png?resizew=20)
(1)求证:AE∥平面DCF;
(2)当AB的长为何值时,二面角A—EF—C的大小为60°?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/2816b2a6-071d-4c3f-89b4-5f20b4261491.png?resizew=150)
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