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

Fredyepr

find a cartesian cuestion r=2cos(theta) + 3sin(theta)

  • one year ago
  • one year ago

  • This Question is Closed
  1. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 0

    x/r = cos(theta) y/r = sin(theta) r^2 = x^2 +y^2 have you made those substitutions?

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

    help me you please.... with this

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

    make those substitutions... tell me what you get...

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

    r= 2x/r + 3 y/r ...........> r2=2x+2y .. ...............> x2 + y2= 2x + 3y ------> x2-2x-3y+y2= 0... is it correct¿?

    • one year ago
  5. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 0

    yes

    • one year ago
  6. Algebraic!
    Best Response
    You've already chosen the best response.
    Medals 0

    you can clean it up a bit by completing the square on both the x and y terms.. eg.: (x^2 -2x) = (x^2 -2x +1) -1 = (x-1)^2 -1

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

    what is the best¿?

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

    what?

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

    ok ok thanks .... can you help with other¿?

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

    xy=8

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

    just sub.s in x=rcos(theta), y=rsin(theta)

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

    rcostheta + rsintheta = 8 ¿?

    • one year 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.