1. The problem statement, all variables and given/known data I conducted an experiment which involves measuring two distances (Y and L) and have used tan to determine the angle, then finally calculated the sine of the angles for use in my analysis. I have uncertainties in both length measurements and am unsure how to propagate the uncertainties the way through. 2. Relevant equations Unsure of what equation to use here. 3. The attempt at a solution Unsure where to start really. Thanks.