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The law of cosines for ABC can be set up as 5^2 = 7^2 + 3^2 – 2(7)(3)cos(B). What could be true about ABC? Law of cosines: a^2 = b^2 + c^2 – 2bccos(A) a = 5 and c = 7 a = 3 and c = 3 b = 7 and c = 5 b = 5 and c = 3
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