Which of the following equations correctly represnt the law of cosines?

A. b2 = a2 + b2 - 2ab ⋅ cos (C)

B. c2 = a2 + b2 - 2ab ⋅ cos (B)

C. b2 = a2 + c2 - 2ac ⋅ cos (B)

D. a2 = b2 + c2 - 2ac ⋅ cos (A)

Question

Kasen Aguirre

15 March, 00:09

+3

Answers (1)

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Mariela Anderson · Answer 1

law of cosines

c^2 = a^2+b^2-2abcosC

b^2 = a^2+c^2-2accosB

a^2 = b^2+c^2-2bccosA

Choice C

Which of the following equations correctly represnt the law of cosines?A. b2 = a2 + b2 - 2ab ⋅ cos (C)B. c2 = a2 + b2 - 2ab ⋅ cos (B)C. b2 = a2 + c2 - 2ac ⋅ cos (B)D. a2 = b2 + c2 - 2ac ⋅ cos (A)