Consider the integral / cos(x)esin(?) dx. The website "integral-calculator.com" provides the following solution: Problem: esin(z) cos(r) da du 1 Substitute u = sin() = cos () (step;) - de = du: COS(C) fe" du Apply exponential rule: a" du = with a = e: In(a) = el Undo substitution u = sin(x): = esin(z) The problem is solved: exin(z) cos(r) dx = ex in() + C Critique this solution. The result is correct, but some of the steps are... questionable. What would you do differently