1 . 如图,在四棱锥
中,底面
是正方形,侧面
是等边三角形,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c043594c9bec3e1f5f3f15c98dff58b2.png)
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求点
到平面
的距离
![](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/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c043594c9bec3e1f5f3f15c98dff58b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2024-03-27更新
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2650次组卷
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3卷引用:上海市曹杨第二中学2023-2024学年高二下学期3月月考数学试卷
名校
解题方法
2 . 在
中,角A,B,C所对的边分别为a,b,c,且
.
(1)证明:
为等腰三角形.
(2)若D是边BC的中点,
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2818bff73d7e297bfbcda3d22d1a153.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(2)若D是边BC的中点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb9af00d442a5c693c970f30efcc916f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2024-06-11更新
|
1273次组卷
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3卷引用:广西柳州市第一中学2023-2024学年高二下学期阶段性期中考试数学试题
解题方法
3 . 如图,直三棱柱
中,
,
是
的中点,
是
的中点.
直线
;
(2)求直线
与平面
所成的角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46720eabe78e309e02c24678632b586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca7c79e163af35ecc1997fa48412af36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
2024-03-24更新
|
1351次组卷
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3卷引用:上海市宝山中学2023-2024学年高二下学期3月考数学试卷
上海市宝山中学2023-2024学年高二下学期3月考数学试卷甘肃省武威市凉州区2023-2024学年高二下学期期中质量检测数学试卷(已下线)专题03 空间向量及其应用全章复习攻略--高二期末考点大串讲(沪教版2020选修)
解题方法
4 . 如图,已知平面
,
,直线
平面
,且
平面
.求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be509ef5101aae24609ff9941cb246fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa807136194c18d3ac58902c67f9333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/22/65bb0b48-a810-4828-8f53-423ccc862ef7.png?resizew=164)
您最近一年使用:0次
5 . 在空间直角坐标系中,已知
,求证:A,B,C三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5d180129495c1bce970bffe09693f2.png)
您最近一年使用:0次
名校
6 . 已知四棱锥
中,
,
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7b2c28becbbb5981d5c7b126430011.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef9b7b94d209c2fcd994da684869ca80.png)
(2)求直线PC与平面PBD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e52411c8437d0640c5b3d87cf5ebebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82465b63174087aeba7788ed984583d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99998f33ad6edab18180627d4903dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb7b2c28becbbb5981d5c7b126430011.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef9b7b94d209c2fcd994da684869ca80.png)
(2)求直线PC与平面PBD所成角的正弦值.
您最近一年使用:0次
2022-11-14更新
|
3034次组卷
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8卷引用:浙江省温州市2022-2023学年高二上学期期中数学试题
浙江省温州市2022-2023学年高二上学期期中数学试题浙江省9+1高中联盟2022-2023学年高二上学期期中数学试题(已下线)【2022】【高二数学】【期中考】-171陕西省西安市西安电子科技中学2023-2024学年高二上学期期中测评数学试题山西省晋城市第一中学校2024届高三上学期10月月考数学试题山西省晋城市第一中学校2024届高三上学期第七次调研数学试题广西壮族自治区“贵百河”2024届高三下学期4月质量调研联考数学试题(已下线)宁夏回族自治区银川一中2024届高三下学期第四次模拟考试数学(理)试卷
21-22高二·湖南·课后作业
7 . 已知
的三个顶点分别为
,
,
.求证:
是直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b67f00fc8cbfe77d14a99c5de7479ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f037d42f43dc1ea25242fadde956ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ad66c8b940c22a7e255052b74b6de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
8 . 在三棱锥
中,
平面
,
,
,
,
分别是
,
的中点,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/4ad15dc9-b1bc-4603-bbcf-de0baa6069f3.png?resizew=167)
(1)求证:
平面
.
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc2aaed1e9ead175f30f7130569d0411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/886fe246fc8dbff2f1b68834ddccf5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5034a973110e2a6eb2e7d5699c24f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b7364eb169f7c8c06400f01fbee343.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/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/4ad15dc9-b1bc-4603-bbcf-de0baa6069f3.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef720d25e08397606552f21b6cc72bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bea9277fccf08e98981c3c8f2944cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27d39f37441ee55dbc8f1a6ca199a66b.png)
您最近一年使用:0次
2019-01-23更新
|
2595次组卷
|
2卷引用:广东省佛山市实验中学2020-2021学年高二下学期阶段考试(一)数学试题