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07-07-2018
Mathematics

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the law of cosines is a² + b² - 2abcosC = c². find the value of 2abcosC

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jdoe0001 jdoe0001

07-07-2018

[tex]\bf a^2+b^2-(2ab)cos(C)=c^2\implies a^2+b^2-c^2=(2ab)cos(C)[/tex]

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