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sin2x = 2sinxcosx cos2x = (cosx)^2 - (sinx)^2

I dont think theres another way...tho u could do dividing intervals or something, but thats a retarded method :) and might get u marked down

a) is actually quite simple since " P(a sec 0, b tan 0) and Q(a sec (-0), b tan(-0) ) are extremeties of the latus rectum x=ae" Then Xp = ae asec0 = ae sec0=e

Just a quick question about Q2. I just did it, but is there a faster way apart from subbing in x=a/e into the tanget to find the y value of Q...then doing all that gradient stuff?

Really?? I always had the idea that 3U methods for 3U only and same for 4U...woah, that makes things a lot easier then

I dont think 4U methods are allowed into 2U/3U..e.g. integration by parts

Finished complex, almost finished conics..i think I find that we're chugging along too slowly

imo, harder 3u is the hardest...i find polynomials and integration to be the easiest

Does anyone have a diagram of the DC Electric Motor that labels all the main features: Stator, Rotor - armature, brushes, split ring commutator

I also have a Physics Prac Assessment on Thursday. Its on the Space topic and we have to bring scissors and a stop watch. Is there anything else they could give us apart from trolleys/balls down ramps etc?

E.g. Integrate √(9-x^2) between x=0 and x=3 I know you can use the area of a circle thing but is there a way to do this another method? If its possible but only in 4U, please say so cos i also do 4U

^^^^^ Fixed

http://img300.imageshack.us/img300/4356/eng0lc.jpg

Hahah, so simple..thx

Lets say for example z= (a+ib)^n Is Z conjugate just z=(a-ib)^n Or are there special cases?

If i fail a subject in Preliminary, are there any consequences regarding the progression to YR12? Only think i've heard is that if ur gonna continue a subject in YR12, you have to pass prelim?

I have my Yr11 Eco Yearly Exam tomorrow and the teacher told us that up-to-date statistics would be essential. What statistics should i take down? Cash rate, inflation rate etc?

4U in Yr11? Never knew it was posibble Currently im doing: 2U English 3U Maths 2U Physics 2U Music 2 2U Legal Studies 2U Economics Next year im planning to drop Legal Studies and Music 2 and bump Maths to 4U

What are some trends with income inequality? Also, are there any newpaper arcticles about income inequality on the net?

My presentation is on Monday and i was wondering what i should talk about in order... e.g. Lorenz curve / poverty / disadvantaged groups..etc