名校
1 . 如图,四棱锥P-ABCD的底面是正方形,E为AB的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee92e5d20f0583f559561ec83d32809.png)
(1)证明:
平面PCD.
(2)求DA与平面PCE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee92e5d20f0583f559561ec83d32809.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/17/3b4463a8-09af-4566-9164-bb054be11c5d.png?resizew=135)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
(2)求DA与平面PCE所成角的正弦值.
您最近一年使用:0次
2020-03-24更新
|
746次组卷
|
7卷引用:2020届海南省新高考高三线上诊断性测试数学试题
2 . 如图(1),在平面五边形
中,已知四边形
为正方形,
为正三角形.沿着
将四边形
折起得到四棱锥
,使得平面
平面
,设
在线段
上且满足
,
在线段
上且满足
,
为
的重心,如图(2).
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422239919177728/2422817748992000/STEM/20ec046806f64eac809663c2365ac9db.png?resizew=337)
(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/8e600bf534f3031f32ee71c746aa67cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3d8b2c55aa1dd6463651d19735cee3.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/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62871bb0dff211fc3bd80f9066c25b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905f4cbe939c528692f367fe34333216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcbeeabddf49c407dbfa76c6376164ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990b4e6a33c821c298dec22cf9fbf76e.png)
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422239919177728/2422817748992000/STEM/20ec046806f64eac809663c2365ac9db.png?resizew=337)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e02e6ac5839c5099ac8c41fa637f0a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
您最近一年使用:0次
3 . 已知抛物线
上横坐标为
的点到焦点的距离为
.
(1)求抛物线
的方程;
(2)若过![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7a6fd6d651ae341154c2e40928d628.png)
的直线与圆
切于
点,与抛物线
交于
点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7a6fd6d651ae341154c2e40928d628.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1900d4cefbe715a1844daf1d3cdaaa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defd7c48f03f9db75a64de3b8244626c.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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396b67a6c0a01697acd0e86e021ccb39.png)
您最近一年使用:0次
名校
4 . 如图,在三棱锥
中,平面
平面
,
和
均是等腰直角三角形,
,
,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/88107e3f-fe40-4291-9413-ea576d7ceb4e.png?resizew=153)
(Ⅰ)求证:
平面
;
(Ⅱ)求证:
;
(Ⅲ)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11477bf45c2ad9d554d8f2dbacb5bb67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6677a7d5693deb7e41ed70ecca68f7de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2513bfc5f4c4cbc7c07725b9d59bda6.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/dd4fce8e923062b9779553d6f282895b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95226c64f0afdaa10b95ec097a0720ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/88107e3f-fe40-4291-9413-ea576d7ceb4e.png?resizew=153)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fdb2b9d6a4a54ed1328c5b3adcf7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99116c812715c5e15ee73d088da4c253.png)
(Ⅲ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95226c64f0afdaa10b95ec097a0720ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
您最近一年使用:0次
2020-01-10更新
|
1034次组卷
|
6卷引用:海南省2021届高三下学期体艺生模拟考试数学试题
名校
5 . 如图,在直角梯形
中,
,
,
为
的中点,将
沿
折起到
的位置,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/e83016c5-d719-4e40-87e6-312be761af13.png?resizew=269)
(1)求证:
;
(2)求平面
与平面
所成的角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be4250b66544361de6669b815348400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4b17ce6e90cd3810a3696262e94c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417fce75a36a97dd1c75e04b73c7185e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8cd84a953da26f46a67557b649be86.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/e83016c5-d719-4e40-87e6-312be761af13.png?resizew=269)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1f4ea8cd4a445dfdbc4690f7df3ebd.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f06c4f981c5da9e892ff75d7576efae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2020-03-19更新
|
142次组卷
|
2卷引用:海南省白沙县2023届高三下学期2月水平调研测试数学科试题
6 . 如图,在四棱锥
中,
平面
,底面
是直角梯形,
,
,且
.点
是线段
上一点,且
.
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422240242352128/2422954275471360/STEM/598709c3466a4dc098da661ea5ad9309.png?resizew=188)
(1)求证:平面
平面
.
(2)若
,在线段
上是否存在一点
,使得
到平面
的距离为
?若存在,求
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.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/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6055bdd11923629c3e1d56df5976d4a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2b664be1b40ae8cbe3fd956fea4122f.png)
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422240242352128/2422954275471360/STEM/598709c3466a4dc098da661ea5ad9309.png?resizew=188)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/899017d545d09746afaf0a212cbab68d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0db0c8c435ec8f213929939bdb5db9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b5e290c6b2c5508a3bf6117afbf7e1.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/2cc6f6dfdbe7d39891c35f67e1a95c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e1ee7de45fb9934df31c2b74d5570d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fda40d4d62aa28f9e5f877bbea5ce511.png)
您最近一年使用:0次
解题方法
7 . 如图所示,三棱柱
的侧棱垂直于底面,且
,
,
.
为
的中点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/c76f23c5-3e00-42a1-a928-40babc742d29.png?resizew=172)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c013bbe1fb6e9acf461548b5cf6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/25/c76f23c5-3e00-42a1-a928-40babc742d29.png?resizew=172)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1326cb6665a69896a11e3dced5ad812c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81ae4837875969d3a158cd9200e44c1.png)
您最近一年使用:0次
名校
解题方法
8 . 在四棱锥
中,
平面
,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643792826482688/2645768979554304/STEM/fc20b485-faa4-4884-9023-1eab892c87f5.png?resizew=234)
(1)求证:
;
(2)当
时,求此四棱锥的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0094d7f0082284659eda005ef722580d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643792826482688/2645768979554304/STEM/fc20b485-faa4-4884-9023-1eab892c87f5.png?resizew=234)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
您最近一年使用:0次
2021-01-28更新
|
108次组卷
|
3卷引用:2015届海南省嘉积中学高三下学期第五次测试文科数学试卷
2015届海南省嘉积中学高三下学期第五次测试文科数学试卷(已下线)期末综合检测04-2020-2021学年高一数学下学期期末专项复习(苏教版2019必修第二册)内蒙古赤峰二中2020-2021学年高二上学期期末考试数学(文)试题
9 . 如图,四棱锥
中,底面
是正方形,
平面
,
,
为
与
的交点,
为棱
上一点.
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410914850463744/2412397876346880/STEM/7422c60314574458b59735062e7768be.png?resizew=192)
(1)证明:平面
平面
;
(2)若
平面
,求三棱锥
的体积.
![](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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8a528b9edfc0c9f5f9c475a8b9f38b.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410914850463744/2412397876346880/STEM/7422c60314574458b59735062e7768be.png?resizew=192)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826bf6fa3706921b77ad0eb4fcc206bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b999123e51b75bfeea6bee373e1677e9.png)
您最近一年使用:0次
2020-03-04更新
|
1538次组卷
|
31卷引用:2016届海南省海南中学高三考前模拟十二文科数学试卷
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10 . 如图,在四棱锥
中,正
所在平面与矩形
所在平面垂直.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/3bbe7a94-9f86-414b-8e7e-c42ffe4e2d9b.png?resizew=176)
(1)证明:
在底面
的射影为线段
的中点;
(2)已知
,
,
为线段
上一点,且
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79482c6de6bbd05affc78f9c625e52f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/3bbe7a94-9f86-414b-8e7e-c42ffe4e2d9b.png?resizew=176)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45b04cc3e5adaeff6f9e01e29032803.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d244fd5f3333d94280e70f31c4b50723.png)
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4卷引用:2019年海南省三模数学(文)试题
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