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onegirl Group Title

Find the derivative of f(x) tan 3x - csc 4x.

  • one year ago
  • one year ago

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  1. Twis7ed Group Title
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    So you mean\[\frac{ d }{ dx }(\tan3x-4x)*\frac{ d }{ dx }(3x)*\frac{ d }{ dx }(4x)\]?

    • one year ago
  2. onegirl Group Title
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    no the derivative of tan 3x - 4x...the multiplying part is the directions

    • one year ago
  3. onegirl Group Title
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    hold on wait its tan 3x - csc 4x

    • one year ago
  4. onegirl Group Title
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    its tan 3x- csc 4x i miss typed it

    • one year ago
  5. Twis7ed Group Title
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    That's the answer you got or the correct answer?

    • one year ago
  6. Twis7ed Group Title
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    And what part of the equation is inside the tan? Is it tan(3x)-4x or tan(3x-4x)

    • one year ago
  7. onegirl Group Title
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    No not the correct answer i need to find the derivative of that and it says to multiply the derivatives of 3x and 4x into the promblem

    • one year ago
  8. onegirl Group Title
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    its tan 3x - csc 4x thats how it written

    • one year ago
  9. Hoa Group Title
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    @onegirl Please, post the right question. I confuse, too

    • one year ago
  10. onegirl Group Title
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    okay hold on

    • one year ago
  11. onegirl Group Title
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    let me edit my original question

    • one year ago
  12. onegirl Group Title
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    there do you guys see it now?

    • one year ago
  13. Hoa Group Title
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    yes. i think Twis7ed will guide you well.

    • one year ago
  14. onegirl Group Title
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    ok

    • one year ago
  15. Twis7ed Group Title
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    Oh, ok, so\[\frac{ d }{ dx }(\tan 3x - \csc 4x)=\frac{ d }{ dx }\tan3x - \frac{ d }{ dx }\csc4x\] From that you know that \[\frac{ d }{ dx }\tan3x = 3\sec^2(3x)\] and that \[\frac{ d }{ dx }\csc4x=-4\cot(4x)\csc(4x)\]so you end up with\[\frac{ d }{ dx }(\tan3x-\csc4x)=3\sec^2(3x)+4\cot(4x)\csc(4x)\]

    • one year ago
  16. Twis7ed Group Title
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    ^Do you understand that?

    • one year ago
  17. Hoa Group Title
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    it's the best

    • one year ago
  18. onegirl Group Title
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    yes, so i dont have to multiply the derivatives of 3x and 4x into the whole problem?

    • one year ago
  19. onegirl Group Title
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    yes i understood what you wrote/

    • one year ago
  20. Twis7ed Group Title
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    I'm not sure, what is the entire question?

    • one year ago
  21. onegirl Group Title
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    Okay so I found the derivative of that and my teacher told me to multiply 3x and 4x into it here is how i did it hold on

    • one year ago
  22. onegirl Group Title
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    d/dx (tan(3)x - csc 4x = tan(3) - csc 4

    • one year ago
  23. onegirl Group Title
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    i think i understnad where i went wrong now after seeing what you showed

    • one year ago
  24. Twis7ed Group Title
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    ALright, just try to remember that when you have a trig function you usually use the chain rule with the function and then the function inside of it and it should be easy :)

    • one year ago
  25. onegirl Group Title
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    okay thanks

    • one year ago
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