1. The problem statement, all variables and given/known data f(x) = ln(sin(x)) find f'(x) 3. The attempt at a solution I had a question about this problem. The answer on the website said that f'(x) = cot(x) or cos(x)/sin(x) but I disagreed. I got d/du ln(u) = du/u so f'(x) = cos(x)/sin(x) * cos(x) << for the chain rule because of the derivative of the "inner" function. So my answer was cos^2(x)/sin(x). Are they right or am I? Thanks.