1 . 如图,在三棱柱
中,侧面
为矩形,M,N分别为AC,
的中点.
平面
;
(2)若二面角
的余弦值为
,
,
为正三角形,求直线
和平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72bf4c36a2bbc4d9557a722db1c48ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc731c3d83f42275103a59f6c752a8dc.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa1648474605a022df2f48184862d998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24de84a0b508ffdde407cde13fdbd1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc731c3d83f42275103a59f6c752a8dc.png)
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2 . 已知圆C:
,直线l:
(
),则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550d183b05000722c74baf25eb4a6741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5c5829ddf6feec8fc9709fbc63776c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
A.直线l恒过定点![]() |
B.存在实数m,使得直线l与圆C没有公共点 |
C.当![]() |
D.圆C与圆![]() |
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解题方法
3 . 过抛物线
上的一点P作圆C:
的切线,切点为A,B,则
的最小值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b072ff6d1b83232bebd7d4709ffba4ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81338417602aa3f61f2f62a63fb1184a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e6cdb2806bd5c212f64a36648553514.png)
A.4 | B.![]() | C.6 | D.![]() |
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解题方法
4 . 在四棱锥
中,底面是平行四边形,
在
上,且
.
为
中点,求证:
平面
;
(2)侧棱
上是否存在一点
,使得
平面
.若存在,求
的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9d033f15598a1b498b0a4ea21fbd20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b165d3a4c4aa784e0d66cadaff8f64e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9428c4a6a25d360a036aaf0a92e40988.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(2)侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b2ba2a78454b3c560ca893d694a227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a07f232da44a98f260357e304b51ca1.png)
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解题方法
5 . 已知四棱锥
的底面
是棱长为2的菱形,
,若
,且
与平面
所成的角为
为
的中点,点
在线段
上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
平面
.
;
(2)求平面
与平面
夹角的大小.
![](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/2996d02ef58faec7918d55e5e7a59860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27dd7473bc61f631d788b152b16363f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ad573edaad2b4dc616a0a3eb1fc92f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94b2857b27a9ac7c6c9f87f6217caa49.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
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解题方法
6 . 已知拋物线
,其焦点
到准线的距离为2,过焦点
且斜率大于0的直线
交拋物线于
两点,以
为直径的圆
与准线相切于点
,则圆
的标准方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f80080fac68745fe783b879cccb6140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c542b0541b408b6137dc31e54b902c75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
7 . 已知双曲线
的左、右焦点分别为
,点
为双曲线上一点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0048b27a44caabbd688d30ec89ee40ce.png)
(1)求双曲线
的标准方程及其渐近线方程;
(2)已知直线
与双曲线
交于
两点,且
,其中
为坐标原点,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8ce1534a372db7666711443631c4ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0048b27a44caabbd688d30ec89ee40ce.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2928c016cfbe88a72b8022371d24c329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7d47c633e2e92a2031e4d4562bd331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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8 . 2024年3月某学校举办了春季科技体育节,其中安排的女排赛事共有12个班级作为参赛队伍,本次比赛启用了新的排球用球
,已知这种球的质量指标
(单位:
)服从正态分布
,其中
.比赛赛制采取单循环方式,即每支球队进行11场比赛,最后靠积分选出最后冠军,积分规则如下(比赛采取5局3胜制):比赛中以3:0或3:1取胜的球队积3分,负队积0分;而在比赛中以3:2取胜的球队积2分,负队积1分.9轮过后,积分榜上的前2名分别为1班排球队和2班排球队,1班排球队积26分,2班排球队积22分.第10轮1班排球队对抗3班排球队,设每局比赛1班排球队取胜均概率为
.
(1)令
,则
,且
,求
,并证明:
;
(2)第10轮比赛中,记1班排球队3:1取胜的概率为
,求出
的最大值点
;
(3)以(2)中
作为
的值,在第10轮比赛中,1班排球队所得积分为
,求
的分布列.
参考数据:
,则
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dadc797040130475ddcc88f6d40becfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3960d67499df76159982657fe3a1cbca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c1ed67167078ea4f5f1ee53ee14164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ded2c4797733663f5ebcb2050e59b8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44fed1be8b7e50f18cb90077d9fce8e4.png)
(1)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8196414a210178238536a8d069756586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d677f8118b59929277b58a6eba2901d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f05444087e2b1e117ec5fec0cd54d674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc467da65547162d611315c463607776.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae7f603685353d72babb17cda8e7621.png)
(2)第10轮比赛中,记1班排球队3:1取胜的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1f109f79547d6ae0d94339e689e8f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1f109f79547d6ae0d94339e689e8f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3606c4a853a6a34cb7f33bea81b15a1f.png)
(3)以(2)中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3606c4a853a6a34cb7f33bea81b15a1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c1ed67167078ea4f5f1ee53ee14164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/278238db52a408537172302ebc7921bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feea7a819c46ca846796dbe03cb13fde.png)
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9 . 在
中,
为
的中点,
为边
上的中点,
交
于
,设
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc03a3ba496faee748a8d63e5d4fa92.png)
,
表示
;
(2)若
,
,
,求
的余弦值
(3)若
在
上,且
,设
,
,
,若
,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3adc4ed291596abf3bb93ae7a075d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc03a3ba496faee748a8d63e5d4fa92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd5844deaa2a8cdda9477bcbf76c459.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede13546f2d31024998fd9a81b6004eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0f8a493ac2b5d05c09e47ed4169629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99db7cd00a7debcdd17f4716ba9cd77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72689e44ff4e828835ee13ea82320fc6.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5e19562bf0b7f47fa50b428d4c9f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede13546f2d31024998fd9a81b6004eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0f8a493ac2b5d05c09e47ed4169629.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5685770f82fd0a654c6098caa53e6949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5610dc0acc42d3c5e5c60847842f7254.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc53d9b451ff0fac9e1eb843eadfe33.png)
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解题方法
10 . 在锐角
中,内角
,
,
所对的边分别是
,
,
,且
,则角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
________ ,当
时,
的最大值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36303aa9ad6623f5cfd634ce5786fe9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69225cfdfbc0a9a1ccfdd15c46353b8f.png)
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