名校
1 . 如图,在直三棱柱
中,
,
,点
,
分别在棱
,
上,
,
,
为
的中点.
平面
;
(2)当三棱柱
的体积最大时,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.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/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcd1adfa246dd010772ed91c65b5368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1916d2aa3b9a7d351c6389ed75cbd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aff368051d372bc2394f3a95a0c4ebca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(2)当三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2024-04-29更新
|
811次组卷
|
2卷引用:江西省上高二中2024届高三适应性考试数学试卷
名校
2 . 如图,在三棱柱
中,侧面
底面
,
,点
为线段
的中点.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8007565eb8fbda18585b6e5ace884ddb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b5e6eba51b4933b7886431bea7f52b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba99277e38f8d9f817a9d7db8198219.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6798bf9d72d6d23920a7e30104af2f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12390d01797cb16381bec2e088d792ab.png)
您最近一年使用:0次
2024-04-22更新
|
1895次组卷
|
4卷引用:江西省吉安市第一中学2024届高三三模数学试题
江西省吉安市第一中学2024届高三三模数学试题2024届辽宁省部分重点中学协作体高三下学期4月三模数学试卷湖北省黄冈市浠水县第一中学2024届高三下学期第四次高考模拟数学试题(已下线)6.4 空间向量与立体几何(高考真题素材之十年高考)2
名校
3 . 如图,在直三棱柱
中,
,
,
为
的中点.
平面
.
(2)若以
为直径的球的表面积为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95578eba5dd34ca64b5f228640819cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b531aaca9d037a0d047511eec8f350ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504a36c231b8e80724d01649e7c0944f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
(2)若以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95265f94a8eb7f76b5db6875246a091d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee527f97d0bfc89f791b728d80e562d3.png)
您最近一年使用:0次
2024-04-20更新
|
1392次组卷
|
3卷引用:江西省赣州市十八县(市)二十四校2023-2024学年高二下学期期中考试数学试题
名校
4 . 在菱形
中,
,以
为轴将菱形
翻折到菱形
,使得平面
平面
,点
为边
的中点,连接
.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf0a4c6d97b9db04bef0d77e1585a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f5e22b37cea8a05fa13f85414c7c52.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/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53281d7525b436baab9f432ef0c5831e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a02de156f12f2623da67dda5ceaeb3f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
您最近一年使用:0次
2024-04-18更新
|
1678次组卷
|
4卷引用:江西省南昌市第二中学2023-2024学年高二下学期期中考试数学试卷
江西省南昌市第二中学2023-2024学年高二下学期期中考试数学试卷浙江省宁波市2023-2024学年高三下学期高考模拟考试数学试题(已下线)压轴题04立体几何压轴题10题型汇总-1浙江省重点中学四校2023-2024学年高一下学期5月联考数学试题
名校
5 . 如图,在三棱柱
中,平面
平面
,
,过
的平面与
分别交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/14/9cfa1401-dba7-4adf-8ade-288c789e11a6.png?resizew=174)
(1)证明:四边形
为平行四边形;
(2)若
,则当
为何值时,直线
与平面
所成角的正弦值最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eff0db05826cbff651faf0144904b32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665d44844d2b582e965128979a6f7091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba9574b2a856772570046d87a6242be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db1db021a0cb0c7f301f6760258689d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0ae07505d28385b5ae7fa6769e6f91b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/14/9cfa1401-dba7-4adf-8ade-288c789e11a6.png?resizew=174)
(1)证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e2d45fd8c3d3d809571ce6d3b81271.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
您最近一年使用:0次
2024-04-10更新
|
998次组卷
|
3卷引用:江西省南昌市第十九中学2024届高三下学期第二次模拟考试数学试题
名校
6 . 如图,四棱锥
中,
平面
,四边形
为平行四边形,且
,过直线
的平面与棱
分别交于点
.
(1)证明:
;
(2)若
,
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e7344dca1e40bf072371ddd5640111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/8/06cefdd0-271f-47bb-b1ec-bafb7e787abb.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c989f9f584fef670cb759e0a83923a1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45b6df68fd200c815d20965d6b6139a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f97c77e1f558e1f867ceb372b4a737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6c9a36e2ef7189317ae652c56e49c8.png)
您最近一年使用:0次
名校
7 . 如图,在三棱锥
中,
与
都为等边三角形,平面
平面
分别为
的中点,且
在棱
上,且满足
,连接
.
平面
;
(2)设
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1fda66addd3e54c86ec632ead773227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d6efca23a04c9c25e8d6c8ccd78e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c17a4bb61ec5ac7875f91bce4aa4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73d65319fd396b9fd220f7a95a7a6042.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a459f78e4a3516d8a8535290ede7f386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/582d072dceb5819a1b69d526f1d0eb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce9e55b81e0476b1465e46cbbe4a79a.png)
您最近一年使用:0次
2024-03-29更新
|
1351次组卷
|
5卷引用:江西省部分地区2024届高三下学期3月月考数学试题
解题方法
8 . 在正方体
中,
为四边形
的中心,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
A.![]() | B.![]() |
C.平面![]() ![]() | D.若平面![]() ![]() ![]() ![]() |
您最近一年使用:0次
2024-03-27更新
|
800次组卷
|
4卷引用:2024届江西省九江市二模数学试题
2024届江西省九江市二模数学试题广东省汕头市潮阳区河溪中学2023-2024学年高三下学期第二学月质检数学试题(已下线)数学(江苏专用02)(已下线)专题13.5空间平面与平面的位置关系-重难点突破及混淆易错规避(苏教版2019必修第二册)
9 . 如图,四棱锥
中,底面
是边长为2的菱形,
,已知
为棱
的中点,
在底面的投影
为线段
的中点,
是棱
上一点.
(1)若
,求证:
平面
;
(2)若
,确定点
的位置,并求二面角
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/ff5a86745bfe1dfe7bc2683811210330.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/15/3c1cdb7d-5f31-4e1d-93d6-39a1f6a08b6b.png?resizew=218)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd77b37a624d551fb77afc62b98204f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f79db7c270b6ff9fb0a538ee201cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd3097f5b558b253b7076b2499c39ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce9b8c1c0365b5a1cd8d4a01c271df.png)
您最近一年使用:0次
名校
10 . 如图,在直三棱柱
中,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/100a0e3b-4a49-4dac-bcff-08bc0335a655.png?resizew=133)
(1)证明:
平面
.
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202c17969ab6ef0f6e67a05f38e85e60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bafc928ff8699d260cd53d293b3326.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/22/100a0e3b-4a49-4dac-bcff-08bc0335a655.png?resizew=133)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a76f52ae3ef071a5084d09ec035c80c.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41104641f3e2260d00aeadf8fb8a078a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a76f52ae3ef071a5084d09ec035c80c.png)
您最近一年使用:0次