如图,在三棱柱
中,已知
,
,
,
侧面
.
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570129470603264/1570129475846144/STEM/f44095fce6944042965ed1eec0106c10.png?resizew=283)
(1)求直线
与底面
所成角正切值;
(2)在棱
(不包含端点
)上确定一点
的位置,使得
(要求说明理由);
(3)在(2)的条件下,若
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f60b72ee0127c4c20a448575f219e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://img.xkw.com/dksih/QBM/2011/4/26/1570129470603264/1570129475846144/STEM/f44095fce6944042965ed1eec0106c10.png?resizew=283)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8239d94c830497c40359d1312ec4b282.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7fda523ada8989e466d797b6fcd2e0.png)
(3)在(2)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69cbd2557ef69775b5a883c510091985.png)
2011·辽宁·一模 查看更多[1]
(已下线)2011届辽宁省东北育才学校高三第一次模拟考试数学理卷
更新时间:2016-11-30 18:19:30
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
【推荐1】设角
,
,其中
:
(1)若
,求角
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82388c7dfbd4b1602fcfcd1700af70ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c4f910e61e6ff17dfb4bd96273f9d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187ee1ea3b7e47a6283314322e5decf.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9fd0f5bbf3bed7b44665d0f9d2f4f0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
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【推荐2】如图所示,某地出土的一种“钉”是由四条线段组成,其结构能使它任意抛至水平面后,总有一端所在的直线竖直向上,并记组成该“钉”的四条线段的公共点为O,钉尖为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/d2ea8c43-a52c-4bc9-8219-4a69fc5c0bb4.png?resizew=118)
⑴设
,当
,
,
在同一水平面内时,求
与平面
所成角的大小
结果用反三角函数值表示
.
⑵若该“钉”的三个钉尖所确定的三角形的面积为
,要用某种线型材料复制100枚这种“钉”
损耗忽略不计
,共需要该种材料多少米?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbf8ab39ad513802b852ebfdfee02c0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/d2ea8c43-a52c-4bc9-8219-4a69fc5c0bb4.png?resizew=118)
⑴设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1928def070e2f92b5351f55fbe8eda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b56e44e4f0424a2b7a45567120a2e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4195334905e2f190f958dbf5951456f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa6e3afb5196decc6f087cbfe40cf8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
⑵若该“钉”的三个钉尖所确定的三角形的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bd7b0be1368ed3601a7dd0dc721258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
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【推荐3】如图,在长方体
中,已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/4867cd7a-c4f0-43b3-b4ef-ac645ca8f4f2.png?resizew=156)
(1)若点
是棱
上的中点,求证:
与
垂直;
(2)求直线
与平面
的夹角大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/1/4867cd7a-c4f0-43b3-b4ef-ac645ca8f4f2.png?resizew=156)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
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解题方法
【推荐1】如图,在正方体
中,点M,N,P,E,F分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/6b92fa9d-e2d1-4e45-bc75-e0d843356e76.png?resizew=174)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
;
(2)求
与面
所成角的正弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d3062a2e1d37f6277b2627b560df51f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/6b92fa9d-e2d1-4e45-bc75-e0d843356e76.png?resizew=174)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d853e58bc8dd262f99df3827ead644f.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52173c8cc44246823c2bee21a783b731.png)
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【推荐2】如图,在三棱柱
中,
,顶点
在底面
上的射影恰为
点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/c10159ec-e8a3-4fe7-8c9a-7e26479b3245.png?resizew=133)
(1)分别求出
与底面
、棱
所成的角的大小;
(2)在棱
上确定一点
,使
,并求出二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d76cef03e6b2d02024495a840ab451.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/c10159ec-e8a3-4fe7-8c9a-7e26479b3245.png?resizew=133)
(1)分别求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1f2ff0805c573e3c1fc1720d4e531e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ee992e4455f983dcec7c98d0e51e194.png)
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【推荐3】如图(1),在矩形
中,已知
分别为
和
的中点,对角线
与
交于
点,沿
把矩形
折起,使两个半平面所成二面角为60°,如图(2).
![](https://img.xkw.com/dksih/QBM/2016/12/27/1619412271636480/1619412272193536/STEM/6ea6351d67214b5081ab20df954d42c9.png)
(1)求证:
;
(2)求
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/3858739160f4d99e65be97abe1d4f3d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53abbd672b82a02c4975f99fbbd2c37.png)
![](https://img.xkw.com/dksih/QBM/2016/12/27/1619412271636480/1619412272193536/STEM/6ea6351d67214b5081ab20df954d42c9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1e516cd5a8cce0851d1ea38b54278a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564743a1fe463a981f06914e3cb5e03e.png)
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解题方法
【推荐1】在正三棱锥
中,
,点
在线段
上.过点
作平行于
和
的平面
,分别交棱
于点M,N,O.
(1)证明:四边形
为矩形;
(2)若
,求多面体MNPOBC的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57c6b0a6cb307c4c02f503831862f7d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d0abaa4e36f9675f849c300dff7056.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/7/b0c010cf-ca18-4bd2-8d6f-4ade61823669.png?resizew=130)
(1)证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ee04f40f79d73e803b91530e208330.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8de90eb325adb8122baa14c7e49f703.png)
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【推荐2】如图,
和
所在平面互相垂直,且
,
,
、
分别为
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/0ec20cd6-7f5a-46b9-941b-f37d8006c4f0.png?resizew=191)
(1)求证:
;
(2)四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762cd2d2e0550938fe77347b4a3a42ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d33b11489be0d7f7ec786fb04907c3c.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/0ec20cd6-7f5a-46b9-941b-f37d8006c4f0.png?resizew=191)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
(2)四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef052eb1e849bfcd21b2773d5c08262c.png)
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解题方法
【推荐1】如图,在四棱锥
中,底面
是菱形,
,Q为
的中点,
平面
,
,M是棱
上一点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dc962535-03cb-4e0d-b58c-62474d20400a.png?resizew=195)
(1)证明:
平面
;
(2)求二面角
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/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b61346bd4091070ba84a4046f87f365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931bbffda5e872703c9947eccc47ede2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df46cb89ec29c07e6d7b373cf845f7d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dc962535-03cb-4e0d-b58c-62474d20400a.png?resizew=195)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c233190f9339e777fe26c7b690541baf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a372910e053a09c6257243f3057a7aa.png)
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名校
【推荐2】如图,四棱锥
的底面是平行四边形,
,
,
,线段
与
的中点分别为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b96dce1ec94eb90c243b2eddb78476.png)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69677e8341a5d775d145f595daf08705.png)
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d05cf9c349a95b54fff7dffb062d31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d612df37f456a9cb3a5fd5e1764b76a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb11dcd07c445b707bdaa47dcd728ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3b96dce1ec94eb90c243b2eddb78476.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69677e8341a5d775d145f595daf08705.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc4837d8adb8799a7a6b518729f2eb2a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/d6db0fdb-0078-44ba-8dcc-81ffade1daa1.png?resizew=223)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐3】如图所示,在三棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1276a09f81b098b979b72d9f4b085a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a149d2882706518ea1cf5e11de676e57.png)
.设点
在底面
上的射影为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/33281bd1-6796-4f5a-b727-bb9a2b55982b.png?resizew=161)
(1)求二面角
的余弦值.
(2)设点
在棱
上,且
,试求二面角
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1276a09f81b098b979b72d9f4b085a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a149d2882706518ea1cf5e11de676e57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0870247d35bf60ae14239f608da44759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/33281bd1-6796-4f5a-b727-bb9a2b55982b.png?resizew=161)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb73061827c2685d3f7603485c120ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84251c12be53e98689b0aef8144ff637.png)
您最近一年使用:0次