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Sarahisme

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Everything posted by Sarahisme

  1. yep i see that, i agree , thanks DQW
  2. i am not sure your answer is correct.... does passenger is ship A see the length of ship B as contracted and so the real length of be would be greater than 36 m.....??
  3. so who had the correcct answer then!?
  4. lol phew! finally got a proof right! yay! thanks dave
  5. just checkin that my mind is working in the right way.... i would say passeenger B measures: A: 39.2 m B: 91.9 m do peoples agree with me? -Sarah
  6. i get
  7. phew, here it is, what do you guys think now? dave?
  8. hang on i think i've got it...tell me if this is right, give me a min ...
  9. ok thanks DQW
  10. lol well then !
  11. Sarahisme

    tan x

    ok so i have got this much so far for part (b), but as i said before i then get a infinte sum squared and i don't know how to deal with such a thing!
  12. Sarahisme

    tan x

    i tried a similar method for part (b) but i don't know how to expand the square of a infinite sum...
  13. Sarahisme

    tan x

    when i said "oh ok then you expand it like this...." i ment to post this along with it...
  14. Sarahisme

    tan x

    oh ok then you expand it like this.... therefore all n even terms are zero (assuming you start from n = 1 right?) lol....now for part b! dammit
  15. Sarahisme

    tan x

    or is it this...because this makes more sense to me.... Picture 2.pdf
  16. Sarahisme

    tan x

    this? i gotta run though i'll be back in a few hours...sorry Picture 1.pdf
  17. Sarahisme

    tan x

    oh wait its like an identity or something, 1 + tan^{2} = sec^{2) or something like that, damn i wish i had textbook with me right now
  18. Sarahisme

    tan x

    ok i have so i get tan'(x)= 1 + tan^{2}(-x) but i dont see how this helps... (although i am sure it does )
  19. Sarahisme

    tan x

    sorry to be such a panicky hassle sort of thing, this si just about the most stresfull week so far this year!
  20. Sarahisme

    tan x

    but part a says to use the first fact, not the second (or both) ... or are you talking about doing part b?
  21. sorry i don't quite understand
  22. ok here is my final attempt, god i really hope this is right.... well what do you guys things? :S
  23. ok i tryed, but i think i need a less subtle hint, i just can't do it!! :(:S
  24. ok then...nobody reply...thats fine, even to tell me i'm stupid would be nice!
  25. Sarahisme

    tan x

    there is second part to this question, and again i could do it by other means, but not using the given fact this is the second part to the question:
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