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若△ABC的内角A,B,C所对的边a,b,c满足(a+b)2-c2=4,且C=6...
若△ABC的内角A,B,C所对的边a,b,c满足(a+b)
2-c
2=4,且C=60°,则ab的值为( )
A.
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B.
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C.1
D.
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