如图,正方形ABCD中,E是BC边上一点,以E为圆心,EC为半径的半圆与以A为圆心,AB为半径的圆弧外切,则sin∠EAB的值为____________ .
![](https://img.xkw.com/dksih/QBM/2015/9/23/1573915233787904/1573915239899136/STEM/c1c4ee9ae37e4faeb0337674dec4c7bb.png?resizew=119)
更新时间:2016-12-06 02:41:39
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