Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Omniscience Group Title

\[\int tanxdx\] integration by parts

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. Omniscience Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i integrate it twice; but i dont know why it failed

    • 2 years ago
  2. irkiz Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    separate them into tanx and dx

    • 2 years ago
  3. Omniscience Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i did\[(tanx)(x) - \int\limits xsec^{2}dx \]

    • 2 years ago
  4. hartnn Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    integral sin x /cos x put t= cos x

    • 2 years ago
  5. Omniscience Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i know..but i want to do it by parts

    • 2 years ago
  6. mayankdevnani Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    - ln |cos x| + C proof int tan x dx = int sinx/cos x set u=cosx then we find du=-sinx dx substitute du=-sin x, u=cos x int sinx/cos x= - int of (-1) sin x dx / cosx =- int of du/u Solve the integral = - ln |u| + C substitute back u=cos x = - ln |cos x| + C

    • 2 years ago
  7. mayankdevnani Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok @Omniscience

    • 2 years ago
  8. Omniscience Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i know u-sub i want to do it by parts

    • 2 years ago
  9. mayankdevnani Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    http://wiki.answers.com/Q/Integration_by_parts_of_x_tanx

    • 2 years ago
  10. mayankdevnani Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i think it will help you!!!

    • 2 years ago
  11. Omniscience Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    that's \(xtanx\)

    • 2 years ago
  12. mayankdevnani Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    oh!!! sorry

    • 2 years ago
  13. irkiz Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    maybe you could try converting tan x to sinx/cosx. then integrate sinxsecx by parts?

    • 2 years ago
  14. Omniscience Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok i will try it

    • 2 years ago
  15. irkiz Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    wait. is the ans ln|secx|?

    • 2 years ago
  16. Omniscience Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    -ln(cosx)

    • 2 years ago
  17. irkiz Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    looks the same lol

    • 2 years ago
  18. irkiz Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    sec x is (cosx)^-1 bring the -1 to the front

    • 2 years ago
  19. irkiz Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yup thats the answer

    • 2 years ago
  20. Omniscience Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ok thanks

    • 2 years ago
    • Attachments:

See more questions >>>

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.