如图,已知
中,
,
,
分别为
,
的中点,连结
,过
作
的平行线与
的角平分线交于点
,连结
,若
,
,则
的正弦值为( )
![](https://img.xkw.com/dksih/QBM/2021/9/11/2805686820700160/2806607832424448/STEM/8714f37b-7efb-4b11-acc4-9bb8ba46ffe5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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2021·浙江杭州·二模 查看更多[6]
浙江省杭州市十三中教育集团2021年九年级下学期中考数模拟试卷 (二模)(已下线)专题28.12 《锐角三角函数》全章复习与巩固(培优篇)(专项练习)-2021-2022学年九年级数学下册基础知识专项讲练(人教版)(已下线)专题05 三角形-2022年中考数学毕业班二轮热点题型归纳与变式演练(全国通用)2021年浙江省杭州市拱墅区行知中学中考数学三模试卷(已下线)第11讲 解直角三角形(5大考点)-2022-2023学年九年级数学考试满分全攻略(浙教版)浙教版九年级下册第一章解直角三角形 单元测试数学试题
更新时间:2021-09-12 17:21:09
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【推荐1】图1是一组邻边分别为
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