AnswersS1S-OC Pre-Calculus B E3710 - AGLaw of Sines

Law of Sines Answers

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Assume that Q, R, and S are the angles of a triangle, with opposite sides q, r, and s respectively. Select all of the following that represent the law of cosines.

A
q2 = r2 + s2 – 2rscos(Q)
B
q2 = r2 + s2 – 2qscos(R)
C
r2 = q2 + s2 – 2qscos(Q)
D
r2 = q2 + s2 – 2qscos(R)
E
s2 = q2 + r2 – 2qrcos(S)

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