i'm trying to find the length of a curve, and i've gotten it down to where i need to take the integral of the derivatives squared added together blah blah blah. anyways, how do i find the integral of (2+2cos(x))^1/2 ?

could i use u substitution? i didn't think so because then i'd have a sin (x) to deal with, and i don't think that'd work. with the whole thing being in a square root, i can't just integrate them invidually, correct? so i'm stuck. can anyone help?