在
中,延长
到
,使
,在
上取点
,使
,
![](https://img.xkw.com/dksih/QBM/2023/3/18/3197120146096128/3198702288125952/STEM/fac18877125c4230b786c2d46f923ecf.png?resizew=191)
(1)设
,用
表示向量
及向量
.
(2)若
,且
的面积为
,求
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f120d99fbb4add85b4d56dc8a9c1f142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d1da318c5918697cbad59dd119365d.png)
![](https://img.xkw.com/dksih/QBM/2023/3/18/3197120146096128/3198702288125952/STEM/fac18877125c4230b786c2d46f923ecf.png?resizew=191)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211429ce394297f664f6b8e16edec714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c085dbb9d78aef7d81c3f4d6855f067b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2bd54b10a6ecef3135fe2dd047b452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16a00ffc890ef8cfc038e5039983773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b16a00ffc890ef8cfc038e5039983773.png)
22-23高一下·宁夏·阶段练习 查看更多[4]
宁夏六盘山高级中学2022-2023学年高一下学期第一次月考数学试题(甲卷)福建省福州第十五中学、格致中学鼓山分校、铜盘中学2022-2023学年高一下学期期中考试数学试题第九章 解三角形(B卷·能力提升练)-【单元测试】2022-2023学年高一数学分层训练AB卷(人教B版2019必修第四册)(已下线)重难点专题01 正弦定理与余弦定理-2022-2023学年高一数学重难点题型分类必刷题(人教B版2019必修第四册)
更新时间:2023-03-20 16:39:22
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【推荐1】在
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(1)求角
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(2)若
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【推荐2】在
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(1)求
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(2)若
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【推荐1】在
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(1)已知b=8,c=3,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
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(3)已知a=20,b=29,c=21,求
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【推荐2】在
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【推荐1】如图,四边形ABCD是一个梯形,
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(2)
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【推荐2】如图,已知点C是直线AB上一点,且
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名校
解题方法
【推荐1】如图,在
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(2)如果
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解题方法
【推荐2】在
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