Solutions of Y cOs [G ''(x)] = Arcsin [ f '(x) ]

This has been one of the worst weeks :( I know the cause of it: My weekend, vital to preparing myself for this week, was gone! haha, Next week should be better! 2 more weeks for mid term break :D can't wait. And why is deepavali so close to mid term break? Booo! Not worth it! haha but it's a long week end! YaY!