已知四棱锥
中,四边形
为菱形,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aece402934a706adc736f292c5b98e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/93b05c75-1cd6-48c4-bc27-308e451be8d9.png?resizew=205)
(1)求证:
是等边三角形;
(2)若
,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e199a602a13df7c0754f88b44cfc4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aece402934a706adc736f292c5b98e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/93b05c75-1cd6-48c4-bc27-308e451be8d9.png?resizew=205)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d48ac2a013300a8f10dc00dc148e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
2022·内蒙古呼伦贝尔·模拟预测 查看更多[4]
内蒙古呼伦贝尔市海拉尔第二中学2022届高三下学期第四次模拟考试数学(理)试题福建省厦门外国语学校2021-2022学年高二下学期数学期末模拟试题(4)(已下线)1.2.3 直线与平面的夹角(已下线)7.5 空间向量求空间角(精讲)
更新时间:2022-06-19 20:29:32
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图,在四棱柱
中,底面
是平行四边形,
,点
在底面
内的投影恰为
的中点
.
![](https://img.xkw.com/dksih/QBM/2021/5/10/2717928874844160/2717958078595072/STEM/e00faf10-4b16-4a61-bdbf-ccf3d0cfd896.png?resizew=283)
(1)证明:四边形
为菱形;
(2)若
,
,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/b1de5964353beb55c5058b2a431eecaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2021/5/10/2717928874844160/2717958078595072/STEM/e00faf10-4b16-4a61-bdbf-ccf3d0cfd896.png?resizew=283)
(1)证明:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a58a622e2b1a239f2f96aa1501e9799.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080028a5765a10b0616d46022f2a8d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2095691cd6e3e50722061cbc0bb648.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】如图,平面
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/3cffc3f2-b258-439b-b7db-c5298952c3c8.png?resizew=163)
(1)求证:
平面
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a4e3f0349fa83dc2a0b7d798f04843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6307019d82d2a2a51e0ffd4ebf345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91686de6945575230a817f6f9c6042cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/535e49978f2938bdaf12521fdde7de8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a5deba0b92c6c7ae4a660a9f3991f2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/3cffc3f2-b258-439b-b7db-c5298952c3c8.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1893d78af450a5fa09810537adc2dfa.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐3】在四棱锥
中,底面ABCD为平行四边形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/22b4e11d-0419-4c9d-9c27-d94691d84fc5.png?resizew=167)
(1)证明:四边形ABCD为菱形;
(2)E为棱PB上一点(不与P,B重合),证明:AE不可能与平面PCD平行.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/31/22b4e11d-0419-4c9d-9c27-d94691d84fc5.png?resizew=167)
(1)证明:四边形ABCD为菱形;
(2)E为棱PB上一点(不与P,B重合),证明:AE不可能与平面PCD平行.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,四边形
为梯形,
,四边形
为平行四边形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7772e447-2767-4686-ad61-088aff5cd4bd.png?resizew=164)
(1)求证:
∥平面
;
(2)若
平面
,求:
(ⅰ)直线
与平面
所成角的正弦值;
(ⅱ)点D到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/7772e447-2767-4686-ad61-088aff5cd4bd.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfafce4d4d8e0f1ea99a38c3625d348.png)
(ⅰ)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(ⅱ)点D到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,四棱锥
中,
⊥平面
,
是矩形,
,
直线
与底面
所成的角等于30°,
,.
(1)若
∥平面
,求
的值;
(2)当
等于何值时,二面角
的大小为45°?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39824188969f46dba05c56ea293ebbc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ff6f92dc32ab58ea34fa3fa6bebf64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c838fe78b63f3e6d54778596826c9e5.png)
直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bfcc6d354120bc9b57c3f4cf34c34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94aad4c2109f60fcbf5488a545b16c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce10b4592d407d5fadc2737e21cb9a7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39fb9aff056595bedf19d65a6c5c76e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d73121640d0093a7447a9f09b7ff989.png)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357989253120/1570357994209280/STEM/97634cdf8bfc4fae9a289ef2d1c7c347.png?resizew=158)
您最近一年使用:0次