名校
解题方法
1 . 已知
的内角
的对边分别为
且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d259db06ec6ddd65cce2b7528baa12.png)
(1)求角
的大小;
(2)若
求
的值.
![](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/7132c2d8b2ff504e6c2ba36c4f6dcfaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d259db06ec6ddd65cce2b7528baa12.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180c65967e0ce04c8789118be236e8a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32e2f2d7147cf1699fbfdef9cf4af74.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,已知锐角三角形ABC中,
的面积为
则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/9847e4a4-14f2-4b6d-8124-63ef2854edda.png?resizew=124)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd5bc912adc8b83613b19ea9dbedec2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3087fb8b1ebbb212972185f0ca3495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d58ea6207c535e4549c602fcad4fce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/9847e4a4-14f2-4b6d-8124-63ef2854edda.png?resizew=124)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 为测量两塔塔尖之间的距离,某同学建立了如图所示的几何模型.若
平面
,
平面
,
,
,
,
,
,则塔尖
之间的距离为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/b9b881c5-95ff-4ae0-a581-0365e0a5161c.png?resizew=208)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39967d6f3aed6ce7b6643787795d451d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c611de332ba0c529d633a6cfe5240d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d7c85da1898995718ef5e9b9e8b1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661e02ab6495a10cc6e2a5089b96995a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df00e657c8ad2c4459abc11cebdf88d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e473ae1233546ede41da1871470ab0ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b696d070c72c12d45eb8880a8141882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/b9b881c5-95ff-4ae0-a581-0365e0a5161c.png?resizew=208)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-09-29更新
|
1105次组卷
|
9卷引用:四川省成都市树德中学2021-2022学年高三上学期入学考试文科数学试题
四川省成都市树德中学2021-2022学年高三上学期入学考试文科数学试题四川省成都市树德中学2021-2022学年高三上学期入学考试理科数学试题四川省成都市青羊区树德中学2021-2022学年高三上学期数学(文)入学考试试题四川省成都市青羊区树德中学2021-2022学年高三上学期数学(理)入学考试试题四川省达州外国语学校2024届高三上学期入学考试理科数学试题(已下线)第13课时 课中 余弦定理、正弦定理应用举例(已下线)考点19 解三角形相关的综合问题-备战2022年高考数学典型试题解读与变式(已下线)6.4.3 正、余弦定理的实际运用(精讲)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)6.4.3余弦定理、正弦定理(第3课时)(练案)-2021-2022学年高一数学同步备课 (人教A版2019 必修第二册)
4 . 如图,测量河对岸的塔高
时,可以选与塔底
在同一水平面内的两个观测点
,
,测得
,
,
,并在
处测得塔顶A的仰角为45°,则塔高
( )
![](https://img.xkw.com/dksih/QBM/2021/9/26/2816226382495744/2816665288974336/STEM/bc40d8061b8d44cea2fff9f840f9bf84.png?resizew=126)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/202262caed6869a80feee0cb861a210b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45723dce96b74f027adcb1a4ecd19db8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49833b246bea63226a5bf42888afbe92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
![](https://img.xkw.com/dksih/QBM/2021/9/26/2816226382495744/2816665288974336/STEM/bc40d8061b8d44cea2fff9f840f9bf84.png?resizew=126)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-09-27更新
|
973次组卷
|
3卷引用:四川省成都第七中学2021-2022学年高二上学期入学数学(理科)试题
名校
5 . 已知
的内角
、
、
的对边分别为
、
、
,
,设
,
且
.
(1)求角
的大小,并证明
;
(2)延长
至
,使
,若
的面积
,求
的长.
![](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/60971cc477a7c7af12f5272387e49cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bdfd0bf804b0742f40a8ea5aae68417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae1028e0eaa23eed2c00c59500d2e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32b6dc307d12bbd6b850a67b0599620.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fd1e7b23db81e1cd71ac666322672f.png)
(2)延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432cce1481829c4dfe2bd557f6e9aa4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2dd89c37b60b4596ac30e339aa0000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2021-09-27更新
|
693次组卷
|
3卷引用:四川省成都第七中学2021-2022学年高二上学期入学数学(理科)试题
名校
解题方法
6 . 设
的内角
、
、
的对边分别为
、
、
,且
.若
,则边
的最小值为______ .
![](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/da48400bdf008b043796cf3a550fcd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e658a5aee39ea75e9076aed714ee451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
名校
7 .
的内角
,
,
所对的边分别为
,
,
,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
___________ .
![](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/413f9851aad373d782ae62b308f1de85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af039cad52ca4e1f1e322277bc81afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e29b822cda1ba926e96368094fa1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
您最近一年使用:0次
8 . 在
中,角
的对边分别为
,若
,且
.
(1)求角
的值;
(2)若
,且
的面积为
,求
边上的中线
的长.
![](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/f755a1460754d23089de7cf95b6ba278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e1bd4f72b3edd9647378d1191857fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41322821ce31416fdac8dd6e0aa41c71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
9 . 在△
中,
,
,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825ab7e988caf7eaa1acd9f4bdae5d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b1dd07c0571772e96d318f974724810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-09-14更新
|
428次组卷
|
2卷引用:四川省成都市蓉城名校联盟2021-2022学年高二上学期理科数学入学试题
解题方法
10 . 在
中,内角
,
,
所对的边分别为
,
,
,已知
的面积为
,
,
,则
的值为______ .
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a02394ba1a5aa0d3002f0a1469630ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb573197384b9410cb951a4d1e301b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256b633bc67729ae23268fc17117a0f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2021-09-12更新
|
312次组卷
|
2卷引用:四川省成都市蓉城名校联盟2021-2022学年高二上学期理科数学入学试题