在
中,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b9a53e552116848849b76dab92d0ac.png)
__________________ .
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23-24九年级上·江苏·期末 查看更多[1]
(已下线)专题05锐角三角函数(七大类型)-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(苏科版)
更新时间:2024-01-09 14:59:17
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【推荐1】如图,在长方形OABC中,OA在x轴上,OC在y轴上,且OA=1,AB=3,把
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【推荐2】有两根木棒,分别长
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【推荐1】如图,△ABC的顶点A,B,C都在边长为1的正方形网格的格点上,BD⊥AC于点D,则AC的长为_____ ,sin∠ABD的值为_____ .
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【推荐2】我国汉代数学家赵爽在注解《周髀算经》时给出的“赵爽弦图”如图所示,它是由四个全等的直角三角形与中间的小正方形拼成的一个大正方形,如果大正方形的面积是130,小正方形面积是10,则
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【推荐2】繁塔是古城开封现存古老的建筑之一.某数学小组测量繁塔
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