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回复: Re: a easy probability question, i think..... thanks , i got 1320 as well ~~

回复: Re: [porjectile]Find the range of the angles eh,i cant actually remember the Q, but the previous parts r just to ask u find the cartesian equation, and then find that 4 angles......

回复: Re: [porjectile]Find the range of the angles yeah, i agree, sounds more logical

5 letters r chosen from the letters of the word CRICKET. these five letters r then placed alongside one another to form a five letter arrangement. find the number of distinct five letter arrangements which r possible.... i m not sure with my answer:wave:

given that there r 2 angles for a particle to hit the top of a wall, 2 for hitting the bottom of the wall as well..... if u r asked to find the range of the angles for the particle to hit th wall,they r all projected with the same speed.. 1 of my friends says that it should be between the...

回复: Re: beginners-HSC SPEAKING EXAM ON 15.SEP i m back...... how did u guys go? actually we could decide role play and the report which comes first....

回复: Re: beginners-HSC SPEAKING EXAM ON 15.SEP report should be the first part.... i dont think we r able to choose........ role play is like killing me..we only have 10 mins to prepare after knowing the Qs... i hope the Qs will be easier than my expectation........ anyway,good luck to...

回复: Re: beginners-HSC SPEAKING EXAM ON 15.SEP i m doing mine on 2morrow as well:bomb: but i m going to a different school at Gordon......... i m so scared:eek:

A ball is projected from a point on the ground distant a from the foot of a vertical wall of height b. the ball is projected at an elevation A with speed v. if the ball just clears the wall prove that the greatest height is thx ~~~~

NEW polynomials Qs+ polynomial Qs a bag contains 6 white cubes and 4 black cubes. A cube is drawn out, its colour noted and then replaced. this process is repeated 6 times. a)what is the probability that at least 4 white cubes are withdrawn? b)find the number of white cubes that is most...

in 4 throws with a pair of dice, what is the probability that the sum of the numbers uppermost is 7 at least twice??? answer:19/144 thx~~~

回复: Re: 回复: Re: polynomials Qs~~~~ use this identity to solve 2(2) what i knew is to let a=pi/24.........

回复: Re: polynomials Qs~~~~ here is the 2(2)

回复: Re: polynomials Qs~~~~ dont no how to type square root in my computer:bomb:

回复: Re: polynomials Qs~~~~ how....how could u let the roots be a+1 and a-1 ?? at least use a+d and a-d,isn't it?

1. the roots of x^3+px^2+qx+r=0 form an AP. prove that 2p^3+27r-9pq=0 2. 1)express (tan 4a) in terms of (tan a) 2) hence solve plz help:wave:

Re: 回复: Re: Catholic School Trials 67/84 for ext1 maths is just NO. 10 in my school:burn:

回复: Re: Catholic School Trials agree:mad1:

回复: Re: Catholic School Trials i got 67/84 for maths ext 1....... some1 got 82/84???i just cant believe~~~ how did u achieve it???

i got 67/84 havent had the ranking yet.......