Which of these is the Law of Sines?
a2=b2+c2−2bccosAa^2 = b^2 + c^2 - 2bc\\cos Aa2=b2+c2−2bccosA
a/sinA=b/sinB=c/sinCa/\\sin A = b/\\sin B = c/\\sin Ca/sinA=b/sinB=c/sinC
sin2A+cos2A=1\\sin^2 A + \\cos^2 A = 1sin2A+cos2A=1
tanA=sinA/cosA\\tan A = \\sin A / \\cos AtanA=sinA/cosA