oh, stupid me!!!

argh!!!
i just realized!!!
just this morning when i woke up...
oh, freakin' h...!!
it's 2pi,,, not 1/2pi...!!!
urgh!!! how can i make a stupid mistake like that?!?!?!
i am quite confident that i remember the formula..
becoz i chanted it
"TUPAI MaKan LaGi"
for both comparing SHM & UCM and motion of pendulum
for T=2pi(squareroot m/k) and T=2pi(squareroot L/g)
though it sounds like a child play,,
still,, it's my way of learning..
but then, just how..??
oh,, ALLAH just wanted to show me..
that my brain cannot work properly if i play too much like i did...
serve me right...!!