1 . 2002年北京国际数学家大会会标,是以中国古代数学家赵爽的弦图为基础而设计的,弦图用四个全等的直角三角形与一个小正方形拼成的一个大正方形
如图
,若大、小正方形的面积分别为25和1,直角三角形中较大锐角为
,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/7df7885c-f55b-4556-a40e-c7044be02b11.png?resizew=119)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58365c6ddba8029b75bc00b8618f248b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/7df7885c-f55b-4556-a40e-c7044be02b11.png?resizew=119)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:【市级联考】江苏省徐州市2018-2019学年高一第一学期期末抽测数学试题