名校
1 . 如图,在四棱台
中,平面
平面ABCD,底面ABCD为正方形,
,
.
(1)求证:
平面
.
(2)点
在直线
上,且
平面MCD,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/cd14966183389b10618cbe33fd777407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b12ce74b68cf02f948c8c1c7f4b5922.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/1/21bd3c0b-5d89-4e21-86ad-b19e1be00538.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51e89acc2b46a2ff0e61c894c56382b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2cda9e5690d90d24c318895db59a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
您最近一年使用:0次
2023-05-29更新
|
695次组卷
|
4卷引用:河北省唐山市第十中学2023届高三模拟数学试题
2 . 如图,在三棱锥
中,平面
平面
,若
为等边三角形,
为等腰直角三角形,且
,点E为
的中点,点D在线段
上,且
.
(1)证明:
⊥平面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c5901056b42a05c68f472d826775a82.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/30/241c5334-188b-4445-96d7-07a5f7579941.png?resizew=132)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
3 . 在三棱锥
中,△
和△
都是等边三角形,
,平面
平面
,M是棱AC上一点,且
,则过M的平面截三棱锥
外接球所得截面面积的最大值与最小值之和为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a57bddefd839521ba5a4bb7eb40cf2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
您最近一年使用:0次
名校
4 . 如图所示,在三棱锥
中,已知
平面
,平面
平面
,点
为线段
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/3cd6d4f3-c2c9-4efc-8583-9c5e98030426.png?resizew=152)
(1)证明:
平面
;
(2)若
,
,且三棱锥
的体积为18,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb12d96e3dea2951b5f76d5b88bccfb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/13/3cd6d4f3-c2c9-4efc-8583-9c5e98030426.png?resizew=152)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
您最近一年使用:0次
2023-05-12更新
|
1268次组卷
|
3卷引用:河北省唐山市2023届高三三模数学试题
5 . 在平行四边形ABCD中,
,
,将
沿BD翻折,使点A到达点P处,平面
平面PBC.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/08425ab5-52ef-4557-927f-b035c324dd7f.png?resizew=330)
(1)证明:
平面BCD;
(2)若点M满足
,二面角
的大小为60°.求实数λ的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1bc4fc54bab7ca49f6fc1c60ee54219.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/08425ab5-52ef-4557-927f-b035c324dd7f.png?resizew=330)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
(2)若点M满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62634b76241cef6e250eee87dad489c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04e376d75882fa61c533dbf33ea6f17.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在四棱柱
中,底面
是矩形,平面
平面
,点
是
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/1f2378e7-c968-4f98-bba0-1f0f1cffe5b2.png?resizew=211)
(1)求证:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641d9688e81760c02d0dfc4ba015afb1.png)
平面
;
(2)求直线
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a45953045e613b97eeee15ac188ae2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df37b0af1641687cd79792ebc96eaff9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/17/1f2378e7-c968-4f98-bba0-1f0f1cffe5b2.png?resizew=211)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641d9688e81760c02d0dfc4ba015afb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
2023-05-11更新
|
760次组卷
|
10卷引用:河北省盐山中学2022-2023学年高一下学期期中数学试题
河北省盐山中学2022-2023学年高一下学期期中数学试题河南省商开大联考2022-2023学年高二上学期期末考试数学试题湖北省鄂东南三校联考2022-2023学年高二下学期阶段考试(二)数学试题江西省抚州市资溪县第一中学2022-2023学年高二下学期5月期中考试数学试题陕西省榆林市府谷中学等四校2022-2023学年高二下学期第一次联考理科数学试题甘肃省金昌市永昌县第一高级中学2022-2023学年高二下学期期末数学试题湖北省恩施州巴东县第三高级中学2022-2023学年高二下学期6月第四次月考数学试题辽宁省朝阳市凌源市2022-2023学年高二下学期6月月考数学试题甘肃省武威市天祝藏族自治县第一中学2022-2023学年高二下学期第二次月考数学试题四川省射洪中学校2023届高三下学期第一次月考文科数学试题
7 . 如图,在四棱锥
中,底面
为矩形,
,
是正三角形,平面
平面
,且
,则
与平面
所成角的正切值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/13/ec8bd519-b8c6-4624-8cb5-59d0a57dcf66.png?resizew=168)
![](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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70655aecee7e67f20fda401b726abfc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/13/ec8bd519-b8c6-4624-8cb5-59d0a57dcf66.png?resizew=168)
A.2 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-05-10更新
|
1488次组卷
|
3卷引用:河北省保定市2023届高三一模数学试题
解题方法
8 . 如图,在四棱锥
中,
为等边三角形,
,
,且
,平面
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/5d9bd4cd-3a51-4ed6-b50b-ecfe90d6054a.png?resizew=193)
(1)证明:
平面
;
(2)点
为棱
的中点,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ffc5b60b327e2f07a049eaaf51be3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/5d9bd4cd-3a51-4ed6-b50b-ecfe90d6054a.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb77e46b82b1edbf990e0d0577381932.png)
您最近一年使用:0次
2023-05-05更新
|
1085次组卷
|
2卷引用:2023年普通高等学校招生考试数学模拟试题一
2023·全国·模拟预测
名校
9 . 如图,在几何体
中,四边形
是等腰梯形,四边形
是正方形,且平面
平面
,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/51a8607c-f813-4542-a255-980b66e23460.png?resizew=122)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a68a008a22d5a8cea5fe8dcf31e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5f58d0919b618868df14add12c59ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d28eb567698a9467890bfaebb49c248.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/51a8607c-f813-4542-a255-980b66e23460.png?resizew=122)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52bfb639ad02a425d8e67ab046088ff5.png)
您最近一年使用:0次
2023-05-01更新
|
467次组卷
|
3卷引用:河北省石家庄第二中学2023届高三下学期5月月考数学试题
10 . 如图,在直三棱柱
中,底面
是等腰直角三角形,
,
,
是
的中点,则异面直线
与
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/c8002f0b-6ad7-413b-bb0a-2e82343e56c9.png?resizew=153)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49f871d98aca6049a085af45494e2811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/c8002f0b-6ad7-413b-bb0a-2e82343e56c9.png?resizew=153)
A.0 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-04-25更新
|
1608次组卷
|
8卷引用:河北省文安县第一中学2023-2024学年高一清北班下学期3月月考数学试卷