Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
allsmiles
Group Title
Evaluate ∫∫ over D (cos(sqrt(x^2+y^2)) dA by changing polar coordinates where the disk is with center of origin and radius 2
 2 years ago
 2 years ago
allsmiles Group Title
Evaluate ∫∫ over D (cos(sqrt(x^2+y^2)) dA by changing polar coordinates where the disk is with center of origin and radius 2
 2 years ago
 2 years ago

This Question is Closed

allsmiles Group TitleBest ResponseYou've already chosen the best response.0
I got up to ∫∫[0 to 2pi] [0 to 2] cos(sqrt(r)) r dr dt
 2 years ago

allsmiles Group TitleBest ResponseYou've already chosen the best response.0
but I can't solve for it! How do integrate r*cos(sqrt(r))
 2 years ago

myko Group TitleBest ResponseYou've already chosen the best response.1
\[\int\limits\int\limits_{D}=\int\limits_{0}^{2\pi} d\theta\ \int\limits_{0}^{2}r \cos rdr\]
 2 years ago

allsmiles Group TitleBest ResponseYou've already chosen the best response.0
omg you are correct.
 2 years ago

allsmiles Group TitleBest ResponseYou've already chosen the best response.0
spent literally 30 mins trying to see what I did wrong. That was quick thanks a lot man
 2 years ago

myko Group TitleBest ResponseYou've already chosen the best response.1
by the way:int( rcos r) it's done by integration by parts
 2 years ago

allsmiles Group TitleBest ResponseYou've already chosen the best response.0
can't I do substitution
 2 years ago

allsmiles Group TitleBest ResponseYou've already chosen the best response.0
haha I just did and it didn't work, alright thanks again!
 2 years ago

myko Group TitleBest ResponseYou've already chosen the best response.1
if you have problems look here, :) http://en.wikipedia.org/wiki/Integration_by_parts
 2 years ago

myko Group TitleBest ResponseYou've already chosen the best response.1
there exacly you example
 2 years ago

allsmiles Group TitleBest ResponseYou've already chosen the best response.0
Yeah I got it now, thanks a lot for your help!
 2 years ago
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
 Engagement 19 Mad Hatter
 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.