1 . 在
中,内角
、
、
的对边分别是
、
、
,且
.
(1)求角
的大小;
(2)若
,
的面积为
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/265d0823033004e95a8b13948ac9794d.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
2 . 在
中,已知内角
、
、
的对边分别为
、
、
,且
,
,
,求
、
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/724bcf18ef47c962a297640bf7afd5dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d09feb16414bc003db07354b0a10632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825793ebd4bb376a09621f163ac990a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
3 . 已知在
中,
,
,
,求角
、
、
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa79a550591eb9e1bd07bced3a08fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1892446e9f5c057a6d72a64065d01ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff3655cf43d140d246126683d66fb26.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)
您最近一年使用:0次
2020-02-03更新
|
237次组卷
|
2卷引用:人教B版(2019) 必修第四册 学习帮手 第九章 9.1.2 余弦定理
20-21高一·全国·课后作业
名校
4 . 在
中,已知
,
,锐角
满足
,求
(精确到
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6de1d395e6c48c0676a1488a299479d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d174cef0d1e638e8947eda2ba2abbfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f7705384a6eecb13e039f3134e9204e.png)
您最近一年使用:0次
2020-02-03更新
|
541次组卷
|
4卷引用:6.4 平面向量的应用
5 . (1)在
中,已知
,
,
,解这个三角形(角度精确到
,边长精确到
);
(2)在
中,已知
,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be68a7c5d12ac090c9422e3d3524987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75f98f7638004577d434fb9057f5e30c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26074b5c5235f9f2556a3818cc9f0782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea6771d7581e9bfff5f7fa9d43f221d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/263a592442ba4c97ad21d02216e720a8.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38f550e95b2950f91e8ec1798b94109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
您最近一年使用:0次
6 . 如图,在
中,
,
,
,
,D在
边上,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/f15003ef-8601-4200-b1b4-cc119b8023fa.png?resizew=182)
(1)求角B的大小;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf47af147e0663996133532ce0f1c33c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4775c549f9891ceee1895c603f134c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c1e75eb744576c32eed3f9d20f9558.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/f15003ef-8601-4200-b1b4-cc119b8023fa.png?resizew=182)
(1)求角B的大小;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.png)
您最近一年使用:0次
2020-02-01更新
|
2014次组卷
|
8卷引用:专题1.1+正弦定理(2)(重点练)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)
(已下线)专题1.1+正弦定理(2)(重点练)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)(已下线)8.2.2 两角和与差的正弦,正切-2020-2021学年高一数学课时同步练(人教B版2019必修第三册)2020年陕西省高三教学质量检测卷(一)数学理科试题(已下线)2020届超级全能生高考全国卷24省1月联考甲卷数学(理科)试题(已下线)专题06 三角函数及解三角形-2020年高三数学(理)3-4月模拟试题汇编(已下线)专题07 三角形中的组合图形问题(第一篇)-备战2020年高考数学大题精做之解答题题型全覆盖辽宁省锦州市凌海市第三高级中学2019-2020学年高一6月月考数学试题(已下线)【新东方】双师174高一下
名校
7 . 在
中,角
、
、
的对边分别为
、
、
,且
.
(1)若
,
,求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/a4e1cc6b334edcd3aad471721f9b4d1f.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbf6db9baa04be2a9b9037b4d0435ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d62e60396295cd74d03e38978405bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06cf378ef1b77bd5d83ae7b2412ec5e7.png)
您最近一年使用:0次
2020-01-31更新
|
931次组卷
|
5卷引用:专题1.2+余弦定理(2)(基础练)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)
(已下线)专题1.2+余弦定理(2)(基础练)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)2020届江苏省徐州市高三上学期第一次质量抽测数学试题2020届江苏省苏北四市(徐州、宿迁、淮安、连云港)高三上学期期末数学试题2020届江苏省无锡市天一中学高三第一次模拟考试数学试题(已下线)第1章+解三角形(基础过关)-2020-2021学年高二数学单元测试定心卷(苏教版必修5)
8 . 求证:在△ABC中,有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bf190a17c183d19606dafe0f557ea1.png)
您最近一年使用:0次
2020-01-30更新
|
382次组卷
|
6卷引用:人教B版(2019) 必修第四册 逆袭之路 第九章 9.1.2 余弦定理(1)
人教B版(2019) 必修第四册 逆袭之路 第九章 9.1.2 余弦定理(1)(已下线)【新教材精创】9.1.2 余弦定理(第2课时)导学案(1)(已下线)第九章 解三角形 9.1 正弦定理与余弦定理 9.1.2 余弦定理(已下线)11.3 余弦定理、正弦定理的应用人教B版(2019)必修第四册课本习题9.1.2 余弦定理苏教版(2019)必修第二册课本习题 习题11.3
9 . 如图:在
中,
,
,已知点
在
边上,且
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/066ee727-2d2b-4655-b83b-58f6a1ed66f1.png?resizew=143)
(1)若
,求
的长;
(2)若
,求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6834ac70927ae08d7d36a1922403c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b922c7fc50a56933a6cb9d80b1e7bb6c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/066ee727-2d2b-4655-b83b-58f6a1ed66f1.png?resizew=143)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29470a095de205acb450d5a48b38be1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7b548bb6122b4d2230a953e6988838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
名校
10 . 在△ABC中,角A,B,C所对的边分别为a,b,c,且2acos C-c=2b.
(1)求角A的大小;
(2)若c=
,角B的平分线BD=
,求a.
(1)求角A的大小;
(2)若c=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次
2019-11-01更新
|
863次组卷
|
7卷引用:人教B版(2019) 必修第四册 逆袭之路 第九章 解三角形 本章整合提升