1. The problem statement, all variables and given/known data Find all the natural domain of the function algebraically, and confirm that your result is consistent with the graph produced by your graphing utility. h(x) = 3/2-cosx 2. Relevant equations (a) h(x) = 3/2-cosx (b)x2-1/(x+1) 3. The attempt at a solution Do I need to know trigonometric identities? This is just an introductory chapter, so I am guessing I do not need to know the identities. 2-cosx = 0 to find the discontinuity. But how do I find the natural domain?