Stupid trigo differentiation lahz... cant seem to understand it !!!.... die... 8 questions only know how to do 2.... -sigh- how~!~! *sniff*sniff* how to differentiate... how to simplify ... how to... ayai... dunno how to do lahz...die le lahz... anyone know how to do?? i am so blur now.... cos x = -sin x, sin x =cos x, tan x= sec2 x... den how to simplify when x=∏/3, dy/dx= sin2(∏/3)(-3sin3(∏/3)+cos(∏/3)[2cos2(∏/3)].... how to simplify this~!~!... haiz.... forget it... no mood to coninue anymore... the more i think... my brain gonna burst liaoz... =(
i miss him...know that it is impossible , but still miss him... he is only one that has ever make my heart skip a beat... but guess is impossible lo... but can see him can liaoz... saw him on sat... hmz... how lehz... dunno what to say...