1. The problem statement, all variables and given/known data f(x)= ∫dt/(2 + sin t) A and B are the lower and upper limits of the integral, respectively, where A is 0, and B is ln x. 2. Relevant equations 3. The attempt at a solution g(x)= ln x f(g(x))= ∫1/(2+sin t) dt, with a= 0 and b=g(x) f'(x)= d/dx ∫1/2+sin x, with a=0, and b=x Can't figure out what to do next, and pretty sure what I've done so far is wrong^. Any help is appreciated, thanks so much!