1. The problem statement, all variables and given/known data I know Theta1 and Theta2. I also know sin(Theta1) and sin(Theta2). I am being asked to find the uncertainty of sin(Theta1) and sin(Theta2). 2. Relevant equations 3. The attempt at a solution Should i use the error propagation rule here? if so, will the uncertainty of sin(Theta1) be the partial derivative of sin(Theta1) with respect to Theta thus be cos(Theta1)?