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2008年12月2日星期二


C0NFESSI0N

I ATE SPICY CHAR MEE THIS M0RNING...
obvi0usly i am trying to c0urt death hahas...
then i drank ICE PEACH TEA WHICH IS FREAKING C0LD..L0LS
...hmmmm
AT THE MARKET.. I ATE SPICY WANTON MEE...L0LS..

i think i won't survive through this sunday l0ls...
sure die bef0re that..
then every0ne must gather t0 attend my wake..l0ls

i am seri0usly slacking like n0b0dy's business...
i have yet t0uch a single tut0rial..
in fact any h0mew0rk is und0ne..
c00l rite..
i tink i will flunk j2 l0ls..
if i dun start by this week..
butbutbut....... haiz..
i just g0t the freaking headache that causes me t0 be like paralysed on my bed..

hahas..
i shall teach u s0me maths t0day(equation might be wrong=.<)

t0pic : TRIGO FUNCTIONS

1))if sin x - 3^0.5 cos x.. express it in R sin ( x- @)

To find R,
remember this f0rmula..
(a^2 + b^2)^0.5
a= the c0efficent of sin x
b= the coefficent of cos x

thus, R= ( 1^2 + (3^0.5)^2) = 2

To find @,
always remember this f0rmula tan^-1 (|b|/|a|)
* a and b are the same as ab0ve =D

thus @ is tan^-1 (3^0.5)= 60

hence... the answer is 2 sin (x -60)=DDD

2))A sin ( Bx +C) + D
the ab0ve is a super important f0rmula ..
A= amplitude
B= peri0d
D= horizontal shift
-B/C= wave shift

http://www.sparknotes.com/math/trigonometry/trigonometricfunctions/terms.html

refer to the ab0ve useful website t0 kn0w m0re =D

hmmmm...

bi0l0gy... i think must w0rk hard fr0m next week =D

Music Took Control at; 06:52



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