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sandy524

Find the derivative of f when f(x) = 2 tan(x) + 3 cot(x)

  • one year ago
  • one year ago

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  1. cwrw238
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    derivative of tan x is sec^x can't remember derivative of cot x - try googling it first term of derivative is 2 sec^2 x

    • one year ago
  2. sandy524
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    of cotx? its -csc^2

    • one year ago
  3. cwrw238
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    http://www.math.com/tables/derivatives/tableof.htm this link lists derivatives

    • one year ago
  4. sandy524
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    please help

    • one year ago
  5. muhammad9t5
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    sol: let y=f(x) y=2tan(x)+3cot(x) =2dy/dxtanx+3dy/dxcotx =2*sec^2x+3*-cosec^2x =2sec^2x-3cosec^2x

    • one year ago
  6. cwrw238
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    oh ok so f'(x) = 2 sec^2 x - 3 csc^2 x

    • one year ago
  7. sandy524
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    think they want me to make in ration form its number 3 on the hw i have attached

    • one year ago
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  8. muhammad9t5
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    is it answer??

    • one year ago
  9. sandy524
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    thats not one of the answer choices

    • one year ago
  10. sandy524
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    muhammand please help

    • one year ago
  11. sandy524
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    estudier please help

    • one year ago
  12. muhammad9t5
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    are these questions???

    • one year ago
  13. sandy524
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    yes the document i have attached is the homework i am looking at number 3 specifically

    • one year ago
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  14. cwrw238
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    ah what they have done is convert the sec and csc to sin and cos

    • one year ago
  15. sandy524
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    okay...

    • one year ago
  16. sandy524
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    so what is the answer

    • one year ago
  17. cwrw238
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    2 sec^2 x - 3 csc^2 x = 2 * 1/cos^2 x - 3 * 1 / sin^2 x

    • one year ago
  18. cwrw238
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    |dw:1350060084696:dw|

    • one year ago
  19. sandy524
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    that is not the answer

    • one year ago
  20. sandy524
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    please help

    • one year ago
  21. sandy524
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    i have to turn it on in ten minutes

    • one year ago
  22. cwrw238
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    well i think it is the answer but its in different form to your choices - i'm trying to figure it out

    • one year ago
  23. swissgirl
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    2sec^2(x)-3csc^2(x)?

    • one year ago
  24. cwrw238
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    yes - do you agree with that answer?

    • one year ago
  25. sandy524
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    the answer choices r on the document

    • one year ago
  26. sandy524
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    swissgirl please help

    • one year ago
  27. sandy524
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    have attached the hw

    • one year ago
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  28. sandy524
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    the answer choice are on the paper

    • one year ago
  29. cwrw238
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    i know that sandy - but i can't figure out which is equivalent to the sec and csc expression

    • one year ago
  30. swissgirl
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    hmm maybe you need to get a common deonmanator

    • one year ago
  31. sandy524
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    :(

    • one year ago
  32. sandy524
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    do anyone know the answer

    • one year ago
  33. sandy524
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    raden please help

    • one year ago
  34. sandy524
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    due in four minutes

    • one year ago
  35. sandy524
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    please type faster

    • one year ago
  36. sandy524
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    i dont need an explainatio just the answer

    • one year ago
  37. sandy524
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    nvm the hw is past due now :(

    • one year ago
  38. cwrw238
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    there might be a mistake in the paper i'm sure 2sec^2x - 3 csc^2 x is correct but u need to convert it

    • one year ago
  39. sandy524
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    smh wow

    • one year ago
  40. cwrw238
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    hold on - i think I've got it

    • one year ago
  41. sandy524
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    its too late

    • one year ago
  42. sandy524
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    thank u anyways

    • one year ago
  43. swissgirl
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    ohhh I got the answer \( \large {2-5\cos^2(x) \over \sin^2(x)\cos^2(x)} \)

    • one year ago
  44. cwrw238
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    yes - i've converted the to sines and cosines but i can't get any of the choices on the paper yes - i got that - but its not one of the choices

    • one year ago
  45. swissgirl
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    its the fourth choice

    • one year ago
  46. cwrw238
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    oh - i've been looking in the wrong place!!!!!

    • one year ago
  47. swissgirl
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    hahah I know its quite confusing to follow

    • one year ago
  48. cwrw238
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    lol

    • one year ago
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