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Which of the following is a form of the law of cosines?
A. (2 - 2 + c2 + 2bc.COS A
B. Q2 = 32 - c2 + 2bc.cos A
C. b = Q? + c2 - 2ac-COS B
D. 32 = c++ C2 - 2ac.cosB
Please select the best answer from the choices provided