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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=asinA,则△ABC的形状为( )
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高二下学期数学《2017-2018学年河北省邯郸市高二(下)期末数学试卷》真题及答案
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,
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不确定
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,
,
所对的边分别为a,b,c,且
,a+b=12,则△ABC面积的最大值为( ) A.8B.9C.16
21
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不确定
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