just in case someone threw away all their amaths notes, like me-.-
i shall post the trigo formula here.
in case someone is panicking in the middle of the night for it, but i also dont think they will come here to check anyway>.<
like who will be so free to do this right?!

(sin^2)x+(cos^2)x=1
(tan^2)x+1=(sec^2)x
1+(cot^2)x=(cosec^2)x

sin2x=2sinxcosx
cos2x=(cos^2)x-(sin^2)x=1-2(sin^2)x=2(cos^2)x-1

think thts all tht is needed from trigo..
GOODLUCK PEOPLE FOR OUR FIRST TEST IN TJC!


smile and the whole world will smile back at you,
FANGYING :DD

p.s please dont tag saying this is useless(: LOL