I am a Physics undergraduate at the University of Texas at Arlington. I am currently taking an Astrophysics class in which my professor talked about the inclination angle of the orbital plane of the binary star system and how it is impossible to determine that angle. I was wondering why is it the case? What exactly makes it impossible to find out the inclination angle of a stellar binary system? I asked my professor and he said that he doesn't think my method would work because our instruments are not sensitive enough and recommended that I contact other people/professors and see what they say since this is not his area of research. I tried playing around with some equations hoping to come up with a way of figuring out the inclination angle to get the true velocity of the star. I have attached what I have been able to come up with so far, however, I am not sure how feasible this would be.