已知△ABC的内角A、B、C所对的边分别为a、b、c,且
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803017_ST/0.png)
.
(I)若a=7,△ABC的面积
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803017_ST/1.png)
,求b、c的值;
(II)若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803017_ST/2.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803017_ST/3.png)
,求
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212138863780329/SYS201310232121388637803017_ST/4.png)
的值.
考点分析:
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