8.2.2 Law of Sines and Law of Cosines

Question 1

The Law of Sines

Answer 1

For any △ABC with side lengths a, b, and c, Sin A/a = Sin B/b = Sin C/c .

Question 2

The Law of Cosines

Answer 2

For any △ABC with side lengths a, b, and c, a^2 = b^2 + c^2 - 2bccosA. b^2 = a^2 + c^2 - 2accosB. c^2 = a^2 + b^2 - 2abcosC.