1. The problem statement, all variables and given/known data f(x) = |sinx| for - π ≤ x ≤ π g(x) = x^2 h(x)= g(f(x)) 1. Find domain and range of h(x) 2. Find an equation of the line tangent to the graph of h at the point where x= π/4 2. Relevant equations 3. The attempt at a solution It think that h(x) is (|sin x|)^2 so, is domain - π ≤ x ≤ π here is where I am confused: if d/dx (sin x) = cos x then is d/dx (|sin x|)^2 = (|cos x|)^2 ? thanks in advance for the help.