1. The problem statement, all variables and given/known data The Spectral lines in a double-lined spectroscopic binary exhibit sinusodal motion with ampliutudes of 15 and 35 km/s in a period of 80hrs. assuming that we view the system close to edge on, calculate the individual masses in solar masses. What would you look for observationally to prove that the system was close to edge on? If the system is not edge on, are the masses lower or higher than the true value and why? 2. Relevant equations 3. The attempt at a solution I have an idea on how to answer the second bits but i have no idea how to get the masses of the stars. Anyone know how? Thanks.