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com/kejian/lishi/借力之江汇三角形的应用举例海宁中学常洪波准备题1
在ABC中,AD为边BC上的中线,1,5ABAD045B,则sin______;______;ABCADBSBACD准备题2
在ABC中,角,,ABC的对边分别为,,abc1c,且满足25cos,325AABAC�,则ABC的面积是______;a的值是______;BAC典例剖析(一题多变