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

sorry peeps, my b'day post will come later, I've a essay to work on :( hmm.. come back on friday? haha.. briefly, Thanks to those who organised the surprise B'day for me!! haha..I really didn't expect for so many ppl to turn up.. haha.. It was great! =D Pics later!