在四棱锥
中,平面PAB⊥平面ABCD,
为等腰直角三角形,
,底面ABCD为矩形,
,点E是AB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/bfdbe1df-9f21-456e-952e-9f452060b01f.png?resizew=146)
(1)证明:EC⊥平面PED;
(2)若F是CD的中点,求直线PF与平面PBC所成角的大小.
![](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/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526908dfb46cf151b8ab1492a9d52047.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/4/bfdbe1df-9f21-456e-952e-9f452060b01f.png?resizew=146)
(1)证明:EC⊥平面PED;
(2)若F是CD的中点,求直线PF与平面PBC所成角的大小.
更新时间:2023-08-02 16:50:34
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相似题推荐
解答题-问答题
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适中
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【推荐1】如图,在四棱锥P﹣ABCD中,△PAD为等边三角形,AB=AD
CD=2,∠BAD=∠ADC=90°,∠PDC=60°,E为BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/552ad9ac-8650-4d91-b020-7af48efc9b05.png?resizew=177)
(1)证明:AD⊥PE.
(2)求直线PA与平面PDE所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c70c0c5a061195b9941796b6a9acc4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/552ad9ac-8650-4d91-b020-7af48efc9b05.png?resizew=177)
(1)证明:AD⊥PE.
(2)求直线PA与平面PDE所成角的大小.
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【推荐2】如图,在四棱锥
中,
平面
,四边形
为正方形,
,G为
中点.
(1)求证:
平面
;
(2)求直线
与平面
所成角.
![](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/d9a4950a6e4202efd609507964af238b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/12/22ef423b-42db-401b-ab0a-7fdcc0a537f6.png?resizew=149)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071159cac13097ea0928285bc1be66d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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【推荐1】如图,四面体
的所有棱长均为2,D,F分别为
,
的中点,且点E为
的三等分点(靠近点B).
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/1e969929-e6e1-422d-8245-f4856eea71f3.png?resizew=160)
(1)设向量
,
,
,用
,
,
表示向量
;
(2)求点D到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334a5773c8d24f29ec3231075170e4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77e9c89b7275b0c1a9af5c9a72e5968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/11/1e969929-e6e1-422d-8245-f4856eea71f3.png?resizew=160)
(1)设向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fbd0a772a009eec08ec6d50a59eae67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7824b7ecd7d62f8a76a05c88bfd6693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95e02cdf7ad2557cd1e92a8b438a9f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa8c53645db602c72b00b599c2c0ff97.png)
(2)求点D到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3747e528a1e8d45668ccf835c0175a73.png)
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解题方法
【推荐2】如图,四棱锥
的底面
为正方形,平面
平面
,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/700188c5-95dc-40ff-9175-9e458c739f8d.png?resizew=217)
(1)证明:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65997b09d0cb2d4a7e46596c1a019e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e03c069ddcfa18b6499c1eb3f3e53c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad17b21f4bd28790218601b430b7c27.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/700188c5-95dc-40ff-9175-9e458c739f8d.png?resizew=217)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1d3eeb763e27daae71af50e22bfdb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3520ee9cc97a075e889e1625dba1157c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da035673ef0edcfae6b72fb5e5ba34a.png)
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解答题-问答题
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名校
解题方法
【推荐1】四棱锥
中,
底面
,底面为矩形,且
,
,
,
![](https://img.xkw.com/dksih/QBM/2020/10/26/2579413055750144/2580604683239424/STEM/1df566180da1475e8e65bf7cfcf59fa6.png?resizew=203)
(1)求异面直线
与
所成角的余弦值;
(2)求直线
与底面所成角的正切值;
(3)求二面角
的大小.
![](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/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.png)
![](https://img.xkw.com/dksih/QBM/2020/10/26/2579413055750144/2580604683239424/STEM/1df566180da1475e8e65bf7cfcf59fa6.png?resizew=203)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
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解题方法
【推荐2】如图,在四棱锥
中,底面
为正方形,
底面
,
,
为线段
的中点,
为线段
上的动点.
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758143769706496/2779884915458048/STEM/e255c8d0173f4bfdae48084dded2a7e5.png?resizew=168)
(1)若平面
交
于点
,求证:
;
(2)求证:
平面
;
(3)判断直线
与平面
所成角的大小是否可以为
,并说明理由.
![](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/829f9180ddd9aa1a0ee0dc520f4e0b5f.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2021/7/6/2758143769706496/2779884915458048/STEM/e255c8d0173f4bfdae48084dded2a7e5.png?resizew=168)
(1)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc143c7fd7c471ca91b6ccc22438fdd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(3)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
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解题方法
【推荐1】下图甲是由直角梯形ABCD和等边三角形CDE组成的一个平面图形,其中
,
,
,将
沿CD折起使点E到达点P的位置(如图乙),使二面角
为直二面角.
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974506017619968/2975673946636288/STEM/c715cc52-82a4-4916-b24f-38cc65a5e763.png?resizew=418)
(1)证明:
;
(2)设Q点为平面PBC与平面PAD的交线l上一点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae1e04eeb4de72e5750dae77bcb6f88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727592aa1cb96156a7f572137ae50393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d9f756419912dd298a0d6857130c80.png)
![](https://img.xkw.com/dksih/QBM/2022/5/7/2974506017619968/2975673946636288/STEM/c715cc52-82a4-4916-b24f-38cc65a5e763.png?resizew=418)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4cd8ba7eb52e38857830162e770f534.png)
(2)设Q点为平面PBC与平面PAD的交线l上一点,求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6cd5738e66ee9b775adae87767154dc.png)
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解题方法
【推荐2】如图,在四棱柱
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff30d72ef5a89ed2a2283576c7c7af8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/8f61e6c5-7606-4bc7-822f-809f84a4d4c5.png?resizew=183)
(1)求证:平面
平面
;
(2)设
为棱
的中点,线段
交于点
平面
,且
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ff30d72ef5a89ed2a2283576c7c7af8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/8f61e6c5-7606-4bc7-822f-809f84a4d4c5.png?resizew=183)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f7d9ac3c0e60f1419dc90a37ff731b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8a7f03ee87eda54e19b79a183d6f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e953d5b4bbf2d81e2fb9e5b85327ed5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d6dfc2fe59b494816a6e9810f75358f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c237015ab2c034ca97cbb3928f7f9b.png)
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名校
【推荐3】(1)在正方体
中,求直线
和平面
所成的角的大小.
(2)已知平面
,
,直线
,且
,
,
,
,试判断直线
与平面
的位置关系并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb04914c4e8fb3483da44c67fe1809f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/6b78792b-0ce7-41d3-b162-eccefeb28831.png?resizew=161)
(2)已知平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5986f2991d45fbf3578f08f27d9fd7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74742135157ce66703f899d52748b78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea730233033e2fca0bce6a369a32582f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b40cd0b4df57efc852aed0d6100642d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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