1. The problem statement, all variables and given/known data Solve the equation x = (1.66x10^28)/(sin^3(45)) 2. Relevant equations n/a 3. The attempt at a solution My attempt is really non existent, since I haven't had to work with sin^3 before, I haven't even seen it before this assignment. Basiclly I'm working out the mass of a binary star using the sin^3 method, and this is the last stage. The rest of the question has nothing to do with this bit I'm stuck on, so I don't think it's worth posting. Can anyone tell me how I'd go about solving this equation? Thanks!