1 . 如图,在四棱锥
中,底面
是正方形,
平面
,且
,点
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/725cef74-5146-4fd0-9650-eba152709436.png?resizew=163)
(1)求证:
平面
;
(2)求二面角
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/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/725cef74-5146-4fd0-9650-eba152709436.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
您最近一年使用:0次
2019-11-21更新
|
1029次组卷
|
7卷引用:新疆维吾尔自治区乌鲁木齐市第一中学2023届高三第三次诊断性测试数学(理)试题
2 . 如图,四棱锥
的底面
是平行四边形,
,
分别为
,
的中点,二面角
的大小为
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/199eda37-064e-4a3c-bb83-a7f26fc4372e.png?resizew=170)
(1)求证:
平面
;
(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/411b38a18046fea8e9fab1f9f9b80a5f.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd2d55c498460b27499518309a5ee66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5d35df6adf50acbcb18e2bd38128e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/199eda37-064e-4a3c-bb83-a7f26fc4372e.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
3 . 如图1,在梯形
中,
,
,
,过
,
分别作
的垂线,垂足分别为
,
,已知
,
,将梯形
沿
,
同侧折起,使得平面
平面
,平面
平面
,得到图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/6d10f95d-c4e1-4bfa-9979-acb575ef5bd0.png?resizew=301)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86338536656046e93b53672ade9a78b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34cfba3cfc718f3684addfa740a43a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/6d10f95d-c4e1-4bfa-9979-acb575ef5bd0.png?resizew=301)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b3b18b7f7e08f195bcdf3acfffff3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe1d31ad2890e57d54c13663b82495ef.png)
您最近一年使用:0次
2019-06-18更新
|
1131次组卷
|
5卷引用:2019届新疆维吾尔自治区高三年级第三次毕业诊断及模拟测试文科数学试题
2019届新疆维吾尔自治区高三年级第三次毕业诊断及模拟测试文科数学试题【市级联考】西藏拉萨市2019届高三第三次模拟考试数学(文)试题福建省莆田市莆田第七中学2019-2020学年高三上学期期中数学(文)试题2020届四川省宜宾市叙州区第一中学校高三上学期期末考试数学(文)试题(已下线)专题8.4 直线、平面平行的判定及其性质(练)-浙江版《2020年高考一轮复习讲练测》
4 . 如图,在三棱锥
中,
,
,
平面
,
、
分别是
上的点,且
平面
.
![](https://img.xkw.com/dksih/QBM/2019/5/11/2201445806587904/2201915056775168/STEM/c9e6236f-533d-474f-85b6-4ab3dd14823f.png?resizew=273)
(Ⅰ)求证:
//平面
;
(Ⅱ)若
为线段
中点,
.求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f4595450fc1286f115f66ee57927434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://img.xkw.com/dksih/QBM/2019/5/11/2201445806587904/2201915056775168/STEM/c9e6236f-533d-474f-85b6-4ab3dd14823f.png?resizew=273)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
您最近一年使用:0次
5 . 在长方体
中,
,
分别是
的中点,
是
上一点,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/eea3ac08-eada-49e6-96e7-19abe6c4ad3a.png?resizew=213)
(I)求
的长;
(Ⅱ)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280b36eba1f8125c41ff6b5dd6db4d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a2241b1b3bea9bd99ca319ff53a85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee72dbf16db9bb8b5b51576a0619c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa42f9a01933fb0e79f008df4edd2944.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/eea3ac08-eada-49e6-96e7-19abe6c4ad3a.png?resizew=213)
(I)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(Ⅱ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa42f9a01933fb0e79f008df4edd2944.png)
您最近一年使用:0次
6 . 如图,在直三棱柱
中,
,
,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/e889dfd0-8e94-400d-b67d-b3d8c5fb94b5.png?resizew=124)
(Ⅰ)证明:直线
平面
;
(Ⅱ)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a9ad711b25c36dae0c2a2cedff9954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/e889dfd0-8e94-400d-b67d-b3d8c5fb94b5.png?resizew=124)
(Ⅰ)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
(Ⅱ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
您最近一年使用:0次
7 . 如图,在四棱锥
中,底面ABCD是边长为2的菱形,
,
,M为PD的中点,E为AM的中点,点F在线段PB上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/9de64bed-b446-46bc-b731-159eb2b071a9.png?resizew=193)
Ⅰ
求证
平面ABCD;
Ⅱ
若平面
底面ABCD,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e4e8e584fe063630a959e21673155e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bb7dbd88c296dada33f7762aaf9298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebd38be3024e7e7649d603a2831c2e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/9de64bed-b446-46bc-b731-159eb2b071a9.png?resizew=193)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a88b42836fb88433679932b48ad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2203f54a88b26847f30df5b29aa4a763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39eadad1f7e05071e19fdd1d114b387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6750d9f532dabdefcb48ccaaf7352f0e.png)
您最近一年使用:0次
2019-04-17更新
|
547次组卷
|
2卷引用:【市级联考】新疆乌鲁木齐2019届高三第二次质量检测文科数学试题
8 . 已知椭圆
过点
,其长轴、焦距和短轴的长的平方依次成等差数列
直线l与x轴正半轴和y轴分别交于点Q、P,与椭圆分别交于点M、N,各点均不重合且满足
.
求椭圆的标准方程;
若
,试证明:直线l过定点并求此定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fef9380b394a4bd829c83a5a5b4c859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d72c5b96cb21f8303cf604586efa601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b13c4f91e8f154babede95f37ac0302.png)
您最近一年使用:0次
2019-03-27更新
|
1404次组卷
|
3卷引用:【省级联考】新疆2019届高三年级第一次毕业诊断及模拟测试文科数学试题
9 . 如图,在四棱锥
中,平面
平面BCDE,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/5cf54a92-71f2-4e18-a39e-21016bd42a20.png?resizew=126)
求证:
平面ABC;
求平面ABE与平面ADC所成二面角大小的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5950b2be8b3a4cef62580f73f7e2f778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99bfa2ca4e398c8ab0f97f47add3754f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265ad748834e159aaeeb9e4e7ccc294b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc219dbd7f28fc44d8dab340ff4b5c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b77d1a22977ce5f43d36e40b648bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef27ae2e2bd091fa0879d0ea96c6d1e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/5cf54a92-71f2-4e18-a39e-21016bd42a20.png?resizew=126)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd244dd270528347a22d8101ac73726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
您最近一年使用:0次
10 . 如图,在四棱锥
中,平面
平面BCDE,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/11/a0c4bfb4-b25f-476f-ac8b-badb3b4b4ba3.png?resizew=139)
求证:
平面ABC;
求点E到平面ADB的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5950b2be8b3a4cef62580f73f7e2f778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99bfa2ca4e398c8ab0f97f47add3754f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265ad748834e159aaeeb9e4e7ccc294b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc219dbd7f28fc44d8dab340ff4b5c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b77d1a22977ce5f43d36e40b648bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef27ae2e2bd091fa0879d0ea96c6d1e9.png)
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