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sandy524

  • 3 years ago

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

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  1. cwrw238
    • 3 years ago
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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

  2. sandy524
    • 3 years ago
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    of cotx? its -csc^2

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

  4. sandy524
    • 3 years ago
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    please help

  5. muhammad9t5
    • 3 years ago
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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

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

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

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  8. muhammad9t5
    • 3 years ago
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    is it answer??

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

  10. sandy524
    • 3 years ago
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    muhammand please help

  11. sandy524
    • 3 years ago
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    estudier please help

  12. muhammad9t5
    • 3 years ago
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    are these questions???

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

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

  15. sandy524
    • 3 years ago
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    okay...

  16. sandy524
    • 3 years ago
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    so what is the answer

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

  18. cwrw238
    • 3 years ago
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    |dw:1350060084696:dw|

  19. sandy524
    • 3 years ago
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    that is not the answer

  20. sandy524
    • 3 years ago
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    please help

  21. sandy524
    • 3 years ago
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    i have to turn it on in ten minutes

  22. cwrw238
    • 3 years ago
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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

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

  24. cwrw238
    • 3 years ago
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    yes - do you agree with that answer?

  25. sandy524
    • 3 years ago
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    the answer choices r on the document

  26. sandy524
    • 3 years ago
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    swissgirl please help

  27. sandy524
    • 3 years ago
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    have attached the hw

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  28. sandy524
    • 3 years ago
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    the answer choice are on the paper

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

  30. swissgirl
    • 3 years ago
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    hmm maybe you need to get a common deonmanator

  31. sandy524
    • 3 years ago
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    :(

  32. sandy524
    • 3 years ago
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    do anyone know the answer

  33. sandy524
    • 3 years ago
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    raden please help

  34. sandy524
    • 3 years ago
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    due in four minutes

  35. sandy524
    • 3 years ago
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    please type faster

  36. sandy524
    • 3 years ago
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    i dont need an explainatio just the answer

  37. sandy524
    • 3 years ago
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    nvm the hw is past due now :(

  38. cwrw238
    • 3 years ago
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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

  39. sandy524
    • 3 years ago
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    smh wow

  40. cwrw238
    • 3 years ago
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    hold on - i think I've got it

  41. sandy524
    • 3 years ago
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    its too late

  42. sandy524
    • 3 years ago
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    thank u anyways

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

  44. cwrw238
    • 3 years ago
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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

  45. swissgirl
    • 3 years ago
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    its the fourth choice

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

  47. swissgirl
    • 3 years ago
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    hahah I know its quite confusing to follow

  48. cwrw238
    • 3 years ago
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    lol

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