名校
1 . 如图,在三棱锥
中,侧棱
底面
,
,
,
,
分别是线段
,
的中点,过线段
的中点
作
的平行线,分别交
,
于点
,
.
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572666336092160/1572666342137856/STEM/862356437f8a4ffa8395f7f0c6509a6c.png?resizew=281)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f37b46c38387b6cff7a473a63351a74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2016/5/31/1572666336092160/1572666342137856/STEM/862356437f8a4ffa8395f7f0c6509a6c.png?resizew=281)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd3262d71a78212e36bc23d5669e5fd.png)
您最近一年使用:0次
2016-12-04更新
|
317次组卷
|
3卷引用:2015-2016学年湖南长郡中学高二下第一次检测理数学卷
2 . 如图,在三棱锥
中,
.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/2b0b0bdc062d446bad6333c2c85303ab.png)
(Ⅰ)求证:
;
(Ⅱ)求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/404dc33059ad4b789729530b4c8ffb17.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/fe7ce458ad1c406bb9d472ebc18b6f58.png)
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/2b0b0bdc062d446bad6333c2c85303ab.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/a01308ab32774397937e2ea60445d476.png)
(Ⅱ)求三棱锥
![](https://img.xkw.com/dksih/QBM/2016/9/7/1573004456312832/1573004461760512/STEM/404dc33059ad4b789729530b4c8ffb17.png)
您最近一年使用:0次
3 . 如图,在四棱锥
中,四边形
是直角梯形,
,
,
底面
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/fde8ab0f6441437298d479310671c940.png)
(1)求证:平面
平面
;
(2)若二面角
的余弦值为
,求直线
与平面
所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/0908cdf3b80444c58ea52f64ac3149cc.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/3ac9e58a07994f218a96ef531948db40.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/b75052eca7554cb79a22b1cef9ef4421.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/1435f65a0b584e628148ae9ea64c2c89.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/69f44b0f586742439c176ad93f1fa830.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/3ac9e58a07994f218a96ef531948db40.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/9dc4f7ea6c274653b15fc327d0d4c019.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/47067157de99493a993643b9bb83e507.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/47ae245e973c47d78e779b0abb041a82.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/b92ea18b8ea045ddbf3063d2ca3db2ad.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/fde8ab0f6441437298d479310671c940.png)
(1)求证:平面
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/3934642828184e0e83df5fd543c6897f.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/e9e729936005495a8120846ba4773758.png)
(2)若二面角
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/c8ec8925aae6436eaf505cf3542efa77.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/192ea4c05faf4f33addc7c5cbc2fb645.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/18bdf5df87694c34b48047f1e253a2cb.png)
![](https://img.xkw.com/dksih/QBM/2016/4/8/1572580955979776/1572580961697792/STEM/3ddaae7105bf47d696f40b3ef7dd9431.png)
您最近一年使用:0次
4 . 如图,
是圆台上底面圆
的直径,
是圆
上不同于
的一点,
是下底面圆
上一点,过
的截面垂直与下底面,
为
的中点,又
.
![](https://img.xkw.com/dksih/QBM/2016/1/7/1572422554230784/1572422560505856/STEM/f87ff3078b5541ccad3606d31ae8e772.png)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25fba8c7f5406607c1a76c166682a99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4912447521918a9dbceb7087e74c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ea61bd3527d296cb8775e3d5b26711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45e5c2aaaf1cb0b400f3dc479aa4f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de563063b301e90ed65ab2a4563317eb.png)
![](https://img.xkw.com/dksih/QBM/2016/1/7/1572422554230784/1572422560505856/STEM/f87ff3078b5541ccad3606d31ae8e772.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1f270df2479467e2c1e57ae58fddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1823e8dc84f524af04ad8909af60b3ae.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5798a5ca58f64c54fe3066393df2a83c.png)
您最近一年使用:0次
5 . 如图1,在
中,
,
,
是
上的高,沿
将
折成
的二面角
,如图2.
![](https://img.xkw.com/dksih/QBM/2015/12/28/1572399647907840/1572399653412864/STEM/eead77bafd43485296e52c5b71b13a20.png)
(1)证明:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
平面
;
(2)设
为
的中点,
,求异面直线
与
所成的角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c9c90cfd058a3f1158b76f7e23819eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82e8acfa57978d59069176c4e030030.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a788c8a0a8599eecbb25eb870ad72e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b11d0840c5718c42ce3fe43fa00a4755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4e1e4bc4d7e04829820f3aaa7d1226.png)
![](https://img.xkw.com/dksih/QBM/2015/12/28/1572399647907840/1572399653412864/STEM/eead77bafd43485296e52c5b71b13a20.png)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2015/12/28/1572399647907840/1572399653412864/STEM/882e91721ad843c39e36c5e48620cf12.png)
(2)设
![](https://img.xkw.com/dksih/QBM/2015/12/28/1572399647907840/1572399653412864/STEM/e1a59e9d33b94907b49bdf9d0ac11e38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2015/12/28/1572399647907840/1572399653412864/STEM/c9c7aa61cb8047ee94b2f836e080602f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2015/12/28/1572399647907840/1572399653412864/STEM/7a11d24d99c14314b10618d18a59464e.png)
您最近一年使用:0次
6 . 如图,直三棱柱ABC-A1B1C1中, AB=AC=AA1,AB⊥AC,M是CC1的中点,N是BC的中点,点P在线段A1B1上运动.
(Ⅰ)求证:PN⊥AM;
(Ⅱ)试确定点P的位置,使直线PN和平面ABC所成的角
(Ⅰ)求证:PN⊥AM;
(Ⅱ)试确定点P的位置,使直线PN和平面ABC所成的角
最大.
![](https://img.xkw.com/dksih/QBM/2017/7/10/1727204777484288/1729114426523648/STEM/a33c13c8bb8b44bab008a6fa3d343739.png?resizew=133)
您最近一年使用:0次
解题方法
7 . 设
是两条不同的直线,
是三个不同的平面,给出下列四个命题:
① 若
,
,则
② 若
,
,
,则
③
,
,则
④ 若
,
,则
其中正确命题的个数是( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b215a2b3a2282ce790998ebaa2c34c.png)
① 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc457ba23645bb1fbaa297c5e565f978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8e9bf63cded4b13272699caaf76f04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b6e422b2e6f6dada4d8c369559a077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229ad7ff99f02612a2647de5986f7471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc457ba23645bb1fbaa297c5e565f978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8ba19014308f9c58b2697281965304.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4042f9c51f83e3367d496e851735d7f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea8e9bf63cded4b13272699caaf76f04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516d9c67a3cef2ab0807e6faa4d49fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d35a45cfcdfbda18b089ce6698ccdbcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b82e5d28e2e5a4790e94db2daa6a07c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35f747152f006301e03b643afb80195c.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
8 . 已知正方体
中,
,
,
分别是棱
,
,
的中点,点
在对角线
上,给出以下命题:①当
在
上运动时,恒有
//面
;②当
在
上运动时,恒有
面
;③若
,则
//面
;④若过点
且与正方体的十二条棱所成的角都相等的直线有
条,过点
且与直线
和
所成的角都为
的直线有
条,则
.其中正确的命题为______ .(填写序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212f4416ce8fcd69b531ceda6f6ebfbc.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4560fa4ad459b58b723c74bd24e51ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc45391918d0bff6b7eb6fa46a1ede3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42b618e1cd0f3a7c27816d86fbe3907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cba9d180918af8c1e08ae0bc6070df9.png)
您最近一年使用:0次
9 . 如图所示,在四棱锥PABCD中,PA⊥平面ABCD,AC⊥AD,AB⊥BC,∠BAC=45°,PA=AD=2,AC=1.
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572425401917440/1572425407971328/STEM/c74046a7-0a53-4b02-ac77-d2b0bb26c8d5.png?resizew=195)
(1)证明:PC⊥AD;
(2)求二面角A-PC-D的正弦值.
![](https://img.xkw.com/dksih/QBM/2016/1/8/1572425401917440/1572425407971328/STEM/c74046a7-0a53-4b02-ac77-d2b0bb26c8d5.png?resizew=195)
(1)证明:PC⊥AD;
(2)求二面角A-PC-D的正弦值.
您最近一年使用:0次
2016-12-04更新
|
342次组卷
|
2卷引用:2015-2016年湖南省株洲市二中高二上第二次月考理数学卷
10 . 已知
为异面直线,
平面
,
平面
,直线
满足
,
,
,
,则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1765c98c56b0f1432b077327843c2f63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d1a34ae2b8c77f8d7e355c6d1d667e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98159914fe3456fea49a8afe255439fb.png)
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