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haha as if u need to work in yr 10 to get good marks if ure getting a scholarship

thanks for your help guys vaguely remembered something like that but i wanted to make sure

hey sorry to ask a pretty silly question but: is there a theorem or somehting i should no about the intersectionof the altitudes in a triangle from each vertices will they always all intersect at the same point? cause im doin a question and i proved it showing the intersection of all three...

what the fuck?

haha yeah i think he does it in like all posts

yeah they are its just a different form of the cos2x and stuff u just let sinx=sin(x/2+x/2) then use the result we know of sin(A+B)=sinAcosB+cosAsinB to get 2sinx/2cosx/2 and cos(A+B) is cosAcosB-sinAsinB and i cant be bothered doin the tan one

yeah im pretty sure you can its part of the syllabus i think

its just a quicker way to write cos@ + isin@ which is just the modulus/arguement form of a complex number

yes its in the syllabus its just like cos2x = cos(x+x) = cos²x - sin² then by rearannging it u get 2cos²x - 1 but his just used cos(x/2+x/2) surely u know this conics?

回复: Trig Problem its not as hard as it looks people are probably just gettin confused by the bearings? the angle subtended at the foot of the pole is 53 +(360 -342) = 71 then just used the cos rule with one of the other sides of the triangle htan64 and the other htan69. so u end up with...

回复: Re: 6 units maths? no, if you doin ext 2 maths you dont actually do adv maths and then ext 1 and ext 2 both count as 2 units each

12c) 's answer is also 1.25 in my book. so it is wrong yeah??

回复: polynomial help you got the expansion wrong it should be x³-7x² +16x -12 =0

回复: Ext 2 Random Questions. What a wankerrrrrr.......

i think you mean the phoenix exam questions by topic? its got like a blue cover yeah thats a god book

回复: Trig!!!!! cos²x - sinx = -1 (1 - sin²x) - sinx = -1 -sin²x - sinx +2=0 sin²x + sinx - 2=0 (sinx+2)(sinx-1)=0 sinx=-2, sinx= 1 no solutions for the first one, x=pi/2 for the second one therefore x=2

o yeah thanks i'd also tried that but with sine instead of cos cheers mate

hey can someone show me how to find the general solutions of sin x + cos x =1? i got x= npi and x=2npi +/- pi/2 but the answer in x=2npi and x=2npi + pi/2 thanks

thats bloody terrible multiple choice in 4 unit?? why do they have to make the tests so much easier?? its good how it is now

回复: Syllabus development multiple choice and a formula sheet in advanced maths that ridiculous way to dumb shit down