名校
解题方法
1 . 在
中,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1157c3d71293348d5459c320437ca4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26308ea6d8f321d27acbd7f9b131f9f1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-07-24更新
|
626次组卷
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6卷引用:第十一章本章测试
2 . 在
中,已知
,
,
,求c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0334bc85843337c4dfcfdc5c638f9f62.png)
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3 . 已知△
中,
(1)若a=3,
,
,求c;
(2)若a=8,
,
,求c;
(3)若a=7,
,
,求c;
(4)若a=14,
,
,求∠C.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(1)若a=3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6129fbf40a950fc8c516f0abaab21957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ceeb6ac7f248397e846f5b61fac6c2f.png)
(2)若a=8,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41c0a7001510f8f30cfca1450928d099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
(3)若a=7,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e459e24a3c880c0aaa155e56a8dde9c.png)
(4)若a=14,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c85ea29310d91178c68c1fd93d01d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d35d8d8bb0dc17f2f86fe5b230a2b8.png)
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4 . 在
中,已知
.
(1)若
,求a,c;
(2)求
的最大角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3997171d06e86e599e6d119f2281677a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e97255daa8a487850b9fa44dcaf059d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2020-08-12更新
|
589次组卷
|
6卷引用:人教B版(2019) 必修第四册 逆袭之路 第九章 解三角形 本章小结
人教B版(2019) 必修第四册 逆袭之路 第九章 解三角形 本章小结(已下线)1.1.2余弦定理(2) -2020-2021学年高二数学课时同步练(人教A版必修5)(已下线)第九章 解三角形 本章小结北京市第九中学2022-2023学年高一下学期数学期末模拟试题(1)人教B版(2019)必修第四册课本习题第九章本章小结【北京专用】专题09解三角形(第二部分)-高一下学期名校期末好题汇编
20-21高一·全国·课后作业
名校
5 . 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)
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2020-02-03更新
|
537次组卷
|
4卷引用:6.4 平面向量的应用
20-21高一·全国·课后作业
6 . 如图,在
中,
,垂足为D,
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f5c2f7fc164f870dec62e2f2f47590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
您最近一年使用:0次
7 . 在
中,已知
,
,
,求平行四边形两条对角线的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b79850d6b00a67110e77a33d1c46b5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf2732c063f01d83e8f7cfc2b138732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa1466856bf2570685d3629c1f813748.png)
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8 . 已知
是锐角三角形,且
.
(1)求
的大小;
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48ea8bb32f9f610a4eab223af13c4fea.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e96c783210ee735131ab3f5d3f8a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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2020-01-31更新
|
629次组卷
|
3卷引用:人教B版(2019) 必修第四册 逆袭之路 第九章 解三角形 本章小结
21-22高二·江苏·课后作业
解题方法
9 . 设椭圆
的两个焦点分别为
,
,短轴的一个端点为P.
(1)若
为直角,求椭圆的离心率;
(2)若
为钝角,求椭圆离心率的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
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10 . 证明:设三角形的外接圆的半径是R,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c3749e009be444e6247c7448fb854a.png)
您最近一年使用:0次
2020-02-03更新
|
579次组卷
|
3卷引用:人教A版(2019) 必修第二册 逆袭之路 第六章 6.4 平面向量的应用 小结