在锐角三角形ABC中,角A、B、C的对边分别为a、b、c,若a=
,c=2,cosA=
,则b=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
更新时间:2021-09-12 16:51:57
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