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设△ABC的内角A,B,C所对的边分别为a,b,c,若bcosC+ccosB=a...
设△ABC的内角A,B,C所对的边分别为a,b,c,若bcosC+ccosB=asinA,则△ABC的形状为( )
A.锐角三角形
B.直角三角形
C.钝角三角形
D.不确定
考点分析:
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