来做简单数学题吧~

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SIKFEE

2020-10-17T08:05:56+00:00

[img]https://img.nga.178.com/attachments/mon_202010/23/-7Q5-fbdKlT3cSmk-kc.png[/img]
a为粉色正方形边长,S为粉色正方形的内接正方形面积,求∠A与S的函数关系式