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

This always happens to me after a long dist run. The way i think changes drastically. I would say that the change this year was a major one. I can see that my mind is a lot more refreshed, to start with and that was something i needed to do for this holidays.If fact my brain is good enough to start the next sem next week, or in a few days time :) But i guess i'll have to go for the cyberia camp and hopefully, more than 2 windsurfing sessions, and a few get-togethers that are coming up. I can't really describe the change but, i guess it's more logical? and perhaps fresher. Also, with this full marathon, i feel that i'm starting to get used to running  full marathons. I guess i'll go on to ultra-marathons (84km) after my timing is about 4.5hrs. That's my nyjc physics tutor's timing for this marathon.haha, i used to think that it was beyond hope for me, but after the recent 30 mins improvement, iam starting to see some light.