Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

yesy7

  • 2 years ago

Find all solutions in the interval [0, 2π). 7 tan^3x - 21 tan x = 0

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

    Let u = tanx Then, the equation becomes \[7u^3-21u=0\]Factorize the left, you'll get\[7u(u^2-3) = 0\]Can you solve u from here?

  2. yesy7
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I just did some of the work on scratch paper from the help of the lessons. Would you mind double checking my work?

  3. RolyPoly
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I don't mind. Please post it :)

  4. yesy7
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I got 0, pi/3, 2pi/3, pi, 4pi/3, 5pi/3?

  5. RolyPoly
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Yup :)

  6. yesy7
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Thank you!

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

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy