解题方法
1 . 已知菱形
的对角线
,
交于点
,
,
,将
沿
折起,使点
到达点
位置,满足
为等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/763aebe1-e5fc-435c-8cf2-c2627538a8de.png?resizew=198)
(1)求证:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eee296a7d9fba487f1485c61580196f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42455c69c95fb9e24a552ae4c40075e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/763aebe1-e5fc-435c-8cf2-c2627538a8de.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
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名校
2 . 已知
为三条不同直线,
为三个不同平面,则下列判断正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ead7f004a93707d658819c75a89dfa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ba63ad02b1d5af2982fac3d91eb15c.png)
A.若![]() ![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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5卷引用:河北省廊坊市2018-2019学年高二第二学期期中联合调研考试文科数学试题
河北省廊坊市2018-2019学年高二第二学期期中联合调研考试文科数学试题【市级联考】河北省廊坊市2018-2019学年高二第二学期期中联合调研考试文科数学试题安徽省安庆一中2018-2019学年高一第二学期期末考试数学试题黑龙江省大庆实验中学2018-2019学年高一下学期期末考试数学(理)试题(已下线)2019年10月8日《每日一题》2020年高考理数一轮复习—— 空间点、直线、平面之间的位置关系
名校
3 . 如图,几何体
中,
是边长为2的正方形,
为直角梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/7c88a072-c8ec-43b8-8c89-5f4338616256.png?resizew=174)
(1)求异面直线
和
所成角的大小;
(2)求几何体
的体积;
(3)若平面
内有一经过点
的曲线
,该曲线上的任一动点都满足
与
所成角的大小恰等于
与
所成角.试判断曲线
的形状并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fc1129846f37afdafd751627c450d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](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/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb476b0dac9799c720354d30b3a85c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/7c88a072-c8ec-43b8-8c89-5f4338616256.png?resizew=174)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fc1129846f37afdafd751627c450d5.png)
(3)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b15febfda66e733f14aa7115ed4343a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
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2卷引用:上海市2018-2019学年高二下学期阶段性检测数学试题
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4 . 已知某四面体的六条棱长分别为3,3,2,2,2,2,则两条较长棱所在直线所成角的余弦值为
A.0 | B.![]() | C.0或![]() | D.以上都不对 |
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2卷引用:上海市2018-2019学年高二下学期阶段性检测数学试题
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5 . 如图,已知四面体
中,
且
两两互相垂直,点
是
的中心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/e3466ecd-2c34-4a59-bb4f-c0edc5179398.png?resizew=163)
(1)过
作
,求
绕直线
旋转一周所形成的几何体的体积;
(2)将
绕直线
旋转一周,则在旋转过程中,直线
与直线
所成角记为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d0940640175a58cb07103f93cc82fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bc4bb4423e7ee3d6fd3b96431a59e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/e3466ecd-2c34-4a59-bb4f-c0edc5179398.png?resizew=163)
(1)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e94633285fd100c13a7cd4d13fad631.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7395984bc46082072e64488def5890e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
(2)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8045847365f5dd3658ffd216c097ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b63d2504bd3ecce8c10560b142356f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
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2卷引用:上海市2018-2019学年高二下学期阶段性检测数学试题
名校
解题方法
6 . 某圆锥体的侧面图是圆心角为
的扇形,当侧面积是
时,则该圆锥体的体积是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44917f942c3fd36614f58d47b5fe1821.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a7c0e4fde1d6fc9e5c6e4389b04d1cf.png)
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2卷引用:上海市2018-2019学年高二下学期阶段性检测数学试题
名校
7 . 以下命题:①根据斜二测画法,三角形的直观图是三角形;②有两个平面互相平行,其余各面都是平行四边形的多面体是棱柱;③两相邻侧面所成角相等的棱锥是正棱锥;④若两个二面角的半平面互相垂直,则这两个二面角的大小相等或互补.其中正确命题的个数为
A.1 | B.2 | C.3 | D.4 |
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2卷引用:上海市2018-2019学年高二下学期阶段性检测数学试题
名校
8 . 已知圆柱
的底面圆的半径与球
的半径相同,若圆柱
与球
的体积相等,则它们的表面积之比![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793e3bbd1062f03abb0d7fa83ff879e8.png)
______ .(用数值作答)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/793e3bbd1062f03abb0d7fa83ff879e8.png)
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3卷引用:上海市2018-2019学年高二下学期阶段性检测数学试题
9 . 如图,正方体
的棱长为1.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/48dae2e5-b7a7-458f-8815-17dd758dfce7.png?resizew=163)
(1)求二面角
的大小;(用反三角函数表示)
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/48dae2e5-b7a7-458f-8815-17dd758dfce7.png?resizew=163)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3fec4fba64d1631538fb9da2c846e23.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
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2卷引用:上海市2018-2019学年高二下学期阶段性检测数学试题
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10 . 已知半径为
的球的球面上有三个点,其中任意两点间的球面距离都等于
,且经过这三个点的小圆周长为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3ef4881bd7c5860178dbdbc7bba6e3.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/856df1a4748257f4db173f179c63e268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9609625b502348556ff8ba32deac8caa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3ef4881bd7c5860178dbdbc7bba6e3.png)
您最近一年使用:0次
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3卷引用:上海市2018-2019学年高二下学期阶段性检测数学试题