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  1. elliottjohnson

    double angle integration

    Hi can somebody please explain how you get from finding the integral (S) of: S (cos6x.cos2x) dx >> to 1/2 S (cos8x + cos4x) dx not sure how to expand the double angle results that leave me with that as an answer?? thanks
  2. elliottjohnson

    1/2 In 3 = In root3

    with the integration of e^x / (1 + (e^x)^2 limits 1/2In3 and 0 how does the last step work. thanks
  3. elliottjohnson

    related rates

    I know some people love doing math early in the morning so could some one please answer before I leave at 6.45AM. A wine glass is shaped so that the depth of the liquid in it is y cm, the volume of the liquid is given by V = 1/5 *y^4 cm^3. At what rate is the level rising when the depth is...
  4. elliottjohnson

    inflation rate and productivity

    hey, can someone please explain to me the relationship between productivity and the rate of inflation. Text doesn't cover in enough detail. thanks!!
  5. elliottjohnson

    Micro and Macroeconomics

    Hi, Can anyone please simplify explain the difference in simple terms? thanks
  6. elliottjohnson

    Icj

    Hey, can anyone please quickly tell me the reason/s for the establishment of the International Court of Justice?? thanks.
  7. elliottjohnson

    22 weeks left

    My careers advisor held a yr 12 meeting last week and told us that out of the odd 500 weeks of school that we have gone thorugh so far we have 22 weeks to go!! cant believe how fast this year has gone, already into week 4 of term 3 and feels like its ending too soon, going too quick! anyway 22...
  8. elliottjohnson

    Economics Marathon - 2010

    Currently with the Business S. marathon this year working as revision for me I wanted to start up the 2010 Economics revision marathon. You know what to do. Answer the Q. and ask a new one. Remember all who participate will benefit, so contribute!!! i'll start.. Define Gross World Product.
  9. elliottjohnson

    Latex

    Hi, When you are posting a new thread in maths how do you start using Latex?? If you respond to a question you can start the software from near the bottom of the page, but how do you do it when starting a new thread?? thanks!!
  10. elliottjohnson

    complex quadratic equation

    10 (c) p30 arnold 1-2i is one root of x^2-(3+i)x+k = 0. Find k and the other root of the equation. Why is the other root NOT the conjugate of 1-2i ??? under what conditions is this rule valid?? thanks for any clearing up.
  11. elliottjohnson

    complex conjugate

    IF x+iy = (a+ib)^2 then without finding x and y, prove that x^2+y^2 = (a^2+b^2)^2 Patel p.138 ex 4H. Q2
  12. elliottjohnson

    globalisation and the environment

    Is globalisation good/bad for the environment ? How has globalisation affected the environment ??
  13. elliottjohnson

    complex num.

    how do you write (3+4i)^-2 in mod-arg and cartesian form?? Can't figure out what to do with the -2 from Patel 2nd edition 4D Q.8
  14. elliottjohnson

    conics equation

    you are given e=2/3 and directrices x=+or-9 how do you find the equation. why isnt the answer x^2/9+y^2/5 = 1 instead it uses the directrices to get x^2/36 + y^2/20 = 1 how do I use laTex when posting a new thread?? thanks!
  15. elliottjohnson

    exchange rate movements and inflation.

    Can someone please 'outline the relationship between exchange rate movements and inflation'. thanks! :]
  16. elliottjohnson

    conics easy q.

    I've just started conics can someone help out. cant seem to get the right answer?? x^2/16 + y^2/36 = 1 find b. the eccentricity c. the foci and e. the equations of directricies I keep getting my e value as sqroot5/3 how is it the correct answer of sqroot20/6 ??
  17. elliottjohnson

    where are you up to?

    as most of us are returning to school within the next week or two. i'm curious as to where in the course are you up to?? i've finished the first topic (management) and have done a couple of points on the accounting topic.
  18. elliottjohnson

    where are you up to??

    hey the holidays are almost over. I was getting ahead in the course a little and was wondering where everyone else was up to? whether that be in the class or on holidays?? Should we have done the first two topics by now ,as combined, they are near the same length as topic 3 and 4.
  19. elliottjohnson

    exam question

    hi, could somebody please try to explain this exam q. to me. This was a HSC exam Question from a few years ago. I cant understand what the question means by NATURE??? is it human nature?? the question is exactly as it appears but changed from Ridley Scott's 'bladerunner' to the film '1984'...
  20. elliottjohnson

    year 12

    wow, just posting for the shear amazment that i'm, like many yr11 students of NSW, now entering my last week of year 11 and my final year of school. Year 11 went so quick,...to quick. Now it begins...
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