7 0/1 points | Previous Answers SEssCalc2 3.1.033 My Notes Ask Your Teache Find the critical numbers of the function. (Enter your answers as a comma-separated list. Use n to denote any arbitrary integer values. If an answer does not exist, enter DNE.) r9) = 4 cos θ + 2 sin2θ Enhanced Feedback Please try again. To find critical numbers of a differentiable function, you need to differentiate the given function f(e) and solve for θ in the equation f"(6) = 0, All solutions, as well as the points where the function is not differentiable, are the critical numbers. Make sure that you use the Chain Rule when differentiating the function. Recall that sin (θ) = 0 has solutions given by θ = nÏ for any integer n and cos (θ) = 1 has solutions given by θ = 2nÏ for any integer n.