Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

onegirl

  • one year ago

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

  • This Question is Closed
  1. Twis7ed
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

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

  2. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no the derivative of tan 3x - 4x...the multiplying part is the directions

  3. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hold on wait its tan 3x - csc 4x

  4. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its tan 3x- csc 4x i miss typed it

  5. Twis7ed
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    That's the answer you got or the correct answer?

  6. Twis7ed
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    And what part of the equation is inside the tan? Is it tan(3x)-4x or tan(3x-4x)

  7. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    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

  8. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    its tan 3x - csc 4x thats how it written

  9. Hoa
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @onegirl Please, post the right question. I confuse, too

  10. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay hold on

  11. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    let me edit my original question

  12. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    there do you guys see it now?

  13. Hoa
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes. i think Twis7ed will guide you well.

  14. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok

  15. Twis7ed
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    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\[\frac{ d }{ dx }(\tan3x-\csc4x)=3\sec^2(3x)+4\cot(4x)\csc(4x)\]

  16. Twis7ed
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    ^Do you understand that?

  17. Hoa
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    it's the best

  18. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes, so i dont have to multiply the derivatives of 3x and 4x into the whole problem?

  19. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes i understood what you wrote/

  20. Twis7ed
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    I'm not sure, what is the entire question?

  21. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    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

  22. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    d/dx (tan(3)x - csc 4x = tan(3) - csc 4

  23. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i think i understnad where i went wrong now after seeing what you showed

  24. Twis7ed
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    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 :)

  25. onegirl
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay thanks

  26. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.