sinA=2sinC\sin \mathrm A = 2\sin \mathrm CsinA=2sinC
2sinA=sinC2\sin \mathrm A = \sin \mathrm C2sinA=sinC
3sinA=2sinC3\sin \mathrm A = 2\sin \mathrm C3sinA=2sinC
2sinA=3sinC2\sin \mathrm A = 3\sin \mathrm C2sinA=3sinC