如图,在四棱锥
中,底面四边形
是矩形,
平面
,
分别是
的中点,
.
(1)求证:
平面
;
(2)求二面角
的大小;
(3)若
,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/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/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac4ee9a98647379757a6f643fb73438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d46554105150391e671609fc6348a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf12905647aeeded72bbca21a63f319.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d9f756419912dd298a0d6857130c80.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553d0677313f0e93008bc0c728060074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
17-18高二上·天津和平·期中 查看更多[4]
天津市和平区2017-2018学年高二上学期期中质量调查数学试题重庆市南岸区2019-2020学年高二上学期期末数学试题吉林省长春市长春外国语学校2022-2023学年高一下学期6月月考数学试题(已下线)专题训练:空间线线角、线面角、面面角求解精练30题-同步题型分类归纳讲与练(人教A版2019必修第二册)
更新时间:2017-11-14 21:50:24
|
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解答题-计算题
|
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【推荐1】如图.在四棱锥P-ABCD中.
平面
.底面ABCD为菱形.E.F分别为AB.PD的中点.
平面
;
(2)若
,
,
,求直线CD与平面EFC所成角的正弦值.
![](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/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4746df85049d1651d3f6c30212a7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a431e58e5d7ecc4b73ae7acdaea250fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c383691e8d740830a865b12d66f7633.png)
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解题方法
【推荐2】如图,在直三棱柱
中,
与
相交于点
,
为
的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/42ad4db5-6a46-481b-88ea-53e6275f6d86.png?resizew=150)
(1)求证:
平面
;
(2)若
,
,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.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/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/42ad4db5-6a46-481b-88ea-53e6275f6d86.png?resizew=150)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686849a983d24dd62270b2967708cc24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
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【推荐1】如图,在三棱锥
中,
,
,侧面
为等边三角形,侧棱
,点
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/37a7d455-0c5e-4149-a80b-646450a0141f.png?resizew=209)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2aaed1e9ead175f30f7130569d0411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836656903472b8c20a2ddd5413474f1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82862a3ea06d5c719ac26406d19f4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da035673ef0edcfae6b72fb5e5ba34a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731d475ac204b904f1b8c2f570148486.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/37a7d455-0c5e-4149-a80b-646450a0141f.png?resizew=209)
(Ⅰ)求证:平面平面
;
(Ⅱ)求直线与平面
所成角的正弦值.
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解答题-问答题
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适中
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【推荐2】如图,在直三棱柱
中,点
分别是
中点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/5f430fbc-0dcc-482d-91b6-a338249679b0.png?resizew=151)
(1)证明:
;
(2)若
,平面
平面
,求直线
与平面
所成角的余弦值.
![](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/bbfb9c088a7422e95f747701a626513d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3baf3a2932ce8811305b3fbde10b514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74cfb0e8784dcd61aa951601837c7a77.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/5f430fbc-0dcc-482d-91b6-a338249679b0.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea23400f38c34260fc327633123a0d2a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a8def8f7114c3441001002081b2430d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
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【推荐3】如图,四棱锥
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/1943276e-4c83-4eca-96eb-acea43c76d70.png?resizew=204)
(1)证明:
;
(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/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa1162d5481e2441fe5bc0d49a576b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce35ed5c80e4d7091d73aa94b420ec11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3eb538f36e6e722e4ce125266b99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ee7262d0b5cbbade014e07e7373501.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/1943276e-4c83-4eca-96eb-acea43c76d70.png?resizew=204)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
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解题方法
【推荐1】直四棱柱
中,
,
,
,
,
.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
平面
;
(2)若四棱柱
的体积为36,求二面角
的大小.(结果要求用反正切表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49437f474e5805688dff21ded2d1fd7c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/6/55feb31a-1a0a-41d2-9463-59ed9d1477b1.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
(2)若四棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab6ad3d3e3064fa417a02dba02dbf04.png)
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【推荐2】如图,在四棱锥E-ABCD中,平面CDE⊥平面ABCD,∠ABC=∠DAB=90°,EC=AD=2,AB=BC=1,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/e4b51493-aad3-4d75-94d4-e21b4e2ceede.png?resizew=188)
(1)证明:AB⊥平面ADE;
(2)求二面角C-AE-D的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520e410203db295a838426752b991eef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/e4b51493-aad3-4d75-94d4-e21b4e2ceede.png?resizew=188)
(1)证明:AB⊥平面ADE;
(2)求二面角C-AE-D的大小.
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