Respuesta:
a^2 =b^2 +c^2 -2bc *Cos A
b^2 =a^2 +c^2 -2ac *Cos B
c^2 =a^2 +b^2 -2ab *Cos C
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Respuesta:
a^2 =b^2 +c^2 -2bc *Cos A
b^2 =a^2 +c^2 -2ac *Cos B
c^2 =a^2 +b^2 -2ab *Cos C