解题方法
1 . 若面
的法向量
,面
的法向量
,两面夹角的正弦值为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e363ca3813a41ccd1138666776700471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d393eec6997a77ba8875552c8faf8fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38823346ce1300ed2601c0c81da97915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
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2021-01-13更新
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3卷引用:辽宁省营口大石桥市第三高级中学2020-2021学年高二上学期期中考试数学(B)试题
辽宁省营口大石桥市第三高级中学2020-2021学年高二上学期期中考试数学(B)试题(已下线)全册综合测试模拟一 -【新教材精创】2020-2021学年高二数学新教材知识讲学(人教A版选择性必修第一册)福建省福清西山学校2021-2022学年高二9月月考数学试题
名校
2 . 在
中,角
,
,
所对的边分别为
,
,
,且
,
,
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/534f33cc16d82470cbff68beffead264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2021-01-10更新
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4卷引用:河南省体育中学2022-2023学年高二上学期期中数学试题
名校
解题方法
3 . 已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354c77c1428998d9be17f64d0b51e533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eeae4e4940d654f083f1073ba872504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-12-13更新
|
637次组卷
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4卷引用:河南省名校联盟2020-2021学年高二上学期期中考试 数学(理科)试题
河南省名校联盟2020-2021学年高二上学期期中考试 数学(理科)试题河南省名校联盟2020-2021学年高二上学期期中考试 数学(文科)试题(已下线)第一章+三角函数(基础过关)-2020-2021学年高一数学单元测试定心卷(人教版必修4)西藏自治区拉萨中学2020-2021学年高一下学期期末考试数学试题
4 . 已知双曲线
的离心率为
,左、右焦点分别为
,
,点
在双曲线
上,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de22f6d864e380a231865d1b4c28041e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66824de7b43243951d46c536657b22b0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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20-21高二上·全国·单元测试
名校
解题方法
5 . 在△ABC中,给出下列4个命题,其中正确的命题是( )
A.若A<B,则sinA<sinB |
B.若sinA<sinB,则A<B |
C.若A>B,则![]() ![]() |
D.A<B,则cos2A>cos2B |
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2020-12-12更新
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6卷引用:第一、二章综合测试(基础过关)-2020-2021学年高二数学单元测试定心卷(人教版选修2-1)
(已下线)第一、二章综合测试(基础过关)-2020-2021学年高二数学单元测试定心卷(人教版选修2-1)湖南省娄底市第一中学2020-2021学年高二下学期期中数学试题(已下线)7.2.3 同角三角函数的基本关系式-2020-2021学年高一数学课时同步练(人教B版2019必修第三册)广东省揭阳第一中学2020-2021学年高一下学期期末数学试题(已下线)第11章 解三角形(基础卷)-2020-2021学年高一数学十分钟同步课堂专练(苏教版2019必修第二册)山东省菏泽市鄄城县第一中学2023-2024学年高一下学期4月月考数学试题
6 . 在锐角
中,角
、
、
所对应的三条边分别为
、
、
,其中
,
,面积
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d39e8c6fc9149d6290c493a65bdc53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e15cbd7c42d7b15d7ba8d2b28ab8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff34041fae18a08034e7bdccf0bdd6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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名校
解题方法
7 . 在
中,角
、
、
的对边分别为
,
,
,若
,
,则
=_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8242f3a6a00149f6211bfce2dfc5c4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c317b6f09c165d183a9a7d599c7b4f7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
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2020-12-03更新
|
874次组卷
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3卷引用:河南省开封市2020-2021学年高二上学期五县联考期中数学(文)试题
名校
解题方法
8 . 在
中,角
的对边分别为
,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8242f3a6a00149f6211bfce2dfc5c4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be788286c6aabb0b3c00c61974408d71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e3fc39d2b508cc1cae769a5e7266c0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:河南省豫北名校2020-2021学年高二上学期11月质量检测数学(文)试题
名校
解题方法
9 . 在
中,
,
,
,则
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5808fe0646a116be04086cd1d3e76824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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|
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2卷引用:河南省开封市2020-2021学年高二上学期五县联考期中数学(理)试题
10 . 已知数列
首项
,且当
时满足
,若
的三边分别为
、
、
,则
最大角的正弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97034664bd213a31e81b9625f83d0e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f65fc200f10b97588a0c9896277c9c64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5da4cd81500bdb43118150dbdb1541e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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