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  1. N

    Mathematics: Post your doubts here!

    i nid notes on vectors paper3.. thnx
  2. N

    Mathematics: Post your doubts here!

    which question?
  3. N

    Maths problem, in differential equation...

    hope iv helped..
  4. N

    Maths problem, in differential equation...

    (ii) 50k * sin 0.6 = ln166 - ln 125 50k * sin 0.6 = ln1.328 k = 0.01 (iii) ln N = 0.502 sin (0.02t) + ln125 ln N - ln 125= 0.502SIN(0.02t) ln (N/125) = 0.502 sin (0.02t) N/125 = e * 0.502 sin (0.02t) N = 125e*0.502 sin (0.02t) least value of N : let sin...
  5. N

    Maths problem, in differential equation...

    1/N dN = k(cos 0.02t) dt then u integrate both sides.. ln N = k/O.O2 sin(O.O2) + C Replace N=125 & t=0 ln N = 50 k sin (0.02) + ln 125
  6. N

    Notes Needed

    anyone hae notes for chemistry A level paper5?
  7. N

    Notes Needed

    thanx a lot sweetiepie .. uv rilly helped me.. :)
  8. N

    Notes Needed

    anyone have A level notes for accounts,economics and computing?
  9. N

    Mathematics: Post your doubts here!

    y P In the diagram the tangent to a curve at a general point P with coordinates (x, y) meets the x-axis at T. The point N on the x-axis is such that PN is perpendicular to the x-axis. The curve is such that, for all values of x. , the area of triangle PTN is equal to tan x, where x is in...
  10. N

    Mathematics: Post your doubts here!

    thanks a lot :)
  11. N

    Mathematics: Post your doubts here!

    The parametric equations of a curve are x = a cos3 t, y = a sin3 t, (i) Express dy dx in terms of t. [3] (ii) Show that the equation of the tangent to the curve at the point with parameter t is x sin t + y cos t = a sin t cos t. [3] (iii) Hence show that, if this tangent meets the x-axis at X...
  12. N

    Chemistry: Post your doubts here!

    hi.. i need help in paper5.. i don't know how to do those question
  13. N

    hi

    thnx the paper was too easy.. :-)
  14. N

    Vampire Diaries.

    yesss.. i love him
  15. N

    problrm with mechanics

    when is your paper?
  16. N

    GUYS! how was ur gp paper?

    i did on experiment on animals..
  17. N

    AS chemistry: post your problem here

    i need notes for paper 5!!
  18. N

    Chemistry AS P34

    mine mauritius..
  19. N

    Vampire Diaries.

    yessssss me too
  20. N

    Vampire Diaries.

    Damon.. he's gorgeous
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