如图,在三棱锥P—ABC中,PA⊥平面ABC,AC⊥BC,D为PC中点,E为AD中点,PA=AC=2,BC=1.
![](https://img.xkw.com/dksih/QBM/2020/7/11/2503776547430400/2503829992464384/STEM/aa082dc0-4db2-4172-97f7-67eb54d64919.png?resizew=210)
(1)求证:AD⊥平面PBC:
(2)求PE与平面ABD所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2020/7/11/2503776547430400/2503829992464384/STEM/aa082dc0-4db2-4172-97f7-67eb54d64919.png?resizew=210)
(1)求证:AD⊥平面PBC:
(2)求PE与平面ABD所成角的正弦值.
19-20高二下·浙江衢州·期末 查看更多[3]
浙江省衢州市2019-2020学年高二下学期6月期末教学质量检测数学试题(已下线)专题09 法向量秒求-2021年高考数学二轮复习解题技巧汇总(新高考地区专用)安徽省滁州市定远县育才学校2022-2023学年高二上学期第一次月考数学试题
更新时间:2020-07-11 22:38:04
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解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】三棱柱
中,侧棱与底面垂直,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/1d02e3d5-36a6-4f8f-b880-25927218679f.png?resizew=144)
(1)求证:
平面
.
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b51da47ab8433342f7a319e412fefae.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/1d02e3d5-36a6-4f8f-b880-25927218679f.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
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【推荐2】如图,四棱锥
中,底面
为矩形,
平面
,且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/b5007f06-7e20-42ed-9aae-1243002552ed.png?resizew=132)
(Ⅰ)求证:
平面
;
(Ⅱ)若
,求二面角
的平面角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7b6d04f024ca05cdfacc8ce9137c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/b5007f06-7e20-42ed-9aae-1243002552ed.png?resizew=132)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db1d8f228c87b65a3609f825fc441d5.png)
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【推荐3】在四棱柱
中,
底面
,底面
为平行四边形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/57476b51-ace1-4975-953c-3d2a6f68bcd0.png?resizew=162)
(1)证明:
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddbb0422a136f45653c8c369f2d75fc.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/7c9cce9e947a01fd80c2e806e2b33a20.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/31/57476b51-ace1-4975-953c-3d2a6f68bcd0.png?resizew=162)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4da530384dd04ac90a025385e8b3c2f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
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【推荐1】如图所示,在四棱柱
中,侧棱
底面
,
,
,
,
,且点M和N分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/8b00d54a-0588-46d6-8a6b-ad7170788de6.png?resizew=150)
(1)求证:
平面
;
(2)求点
到平面
的距离;
(3)在棱
上是否存在点E,使得直线
和平面
所成角的正弦值为
?若存在试求出点E的位置,若没有说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ecf072589c0f901d92f6bda111d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c9d5815dc775d5a5810fff0b016a8d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70c2888dad200ebe6cbc60b7a680ad6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/8b00d54a-0588-46d6-8a6b-ad7170788de6.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fefd8229243bcbee5ac197740e6c66ab.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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【推荐2】如图,平面四边形ABCD中,
,
,
,
,
,点E,F满足
,
,将
沿EF翻折至
,使得
.
;
(2)求平面PCD与平面PBF所成的二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9335f4d4bb04e45cd7bc8da52f694f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24eac9b73cc6c95e0aa7dcf354bb3c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed47dc5be420ecae1e068cd889b38256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b198dacba184a1b6adf6f0cf2b3d76fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11917085059a83ae9771e6712a2a1cc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218870b4b09ddcb96183d6f9c672fb70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7459863f058993e17b7dcf902053eccd.png)
(2)求平面PCD与平面PBF所成的二面角的正弦值.
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解答题-问答题
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(0.65)
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解题方法
【推荐1】如图,在四棱锥P—ABCD中,底面ABCD是边长为3的正方形,PO⊥底面ABCD,
.点
在棱
上,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d669df6c391aa83150df5ae96c39d8.png)
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/b2282e1f-056d-422d-980b-8db369f19e5d.png?resizew=198)
(1)当
,求直线
与平面
所成角的正弦值;
(2)当
取何值时,二面角
的正弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e32a859e1616f7a7e4202d58d030794.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/47d669df6c391aa83150df5ae96c39d8.png)
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/b2282e1f-056d-422d-980b-8db369f19e5d.png?resizew=198)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae890f9e8b32aa53a54158f24f4a87bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/539dd5b8c71359e3a12f67ddf889f643.png)
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【推荐2】如图,在斜三棱柱
中,AB=1,AC=2,
,AB⊥AC,
底面ABC.
![](https://img.xkw.com/dksih/QBM/2020/6/30/2495376825032704/2496051474866176/STEM/987f64b9-c1eb-463a-9931-c2e79eb01d5b.png)
(1)求直线
与平面
所成角的正弦值;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72935e227f601eae1c9558d7aeddbb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11197fb5a297ccd643d34ecdbd04f794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://img.xkw.com/dksih/QBM/2020/6/30/2495376825032704/2496051474866176/STEM/987f64b9-c1eb-463a-9931-c2e79eb01d5b.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/face2d504ad4bbf94bf933f06f43e1c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
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