1. The problem statement, all variables and given/known data Arctan(y)=3x+y how would I go about finding y'? 2. Relevant equations 3. The attempt at a solution I tried to start out with... arctan(y)= tan(x) tan(x)=3x+y tan(x)-3x=y y'=1/(1+x^2) -3 is this correct? thanks in advance.