- #1

- 10

- 0

from -2 to 2,

integral Ln(√(4-y^2)+2)dy,

how to integral that?

integral Ln(√(4-y^2)+2)dy,

how to integral that?

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter splelvis
- Start date

- #1

- 10

- 0

from -2 to 2,

integral Ln(√(4-y^2)+2)dy,

how to integral that?

integral Ln(√(4-y^2)+2)dy,

how to integral that?

- #2

Gib Z

Homework Helper

- 3,346

- 6

This should be in the HOMEWORK forum. Have you even tried anything?

- #3

- 12,134

- 161

Moderator's note: thread moved from "Calculus & Analysis"

- #4

- 251

- 0

[tex] yln (\sqrt{4 - y^{2}} + 2) + 1/2 {\int \frac{y^{2}}{4 - y^{2} + \sqrt{4-y^{2}}}} [/tex]

and got this. For that integral I'm left with, I wanted to try decomposing it or use some kind of partial fractions method, but I have a sqrt expression in my denominator that has a variable inside.. I'm not sure what to do with that..

thanks

- #5

- 1,101

- 3

holezch, your approach works as well I think. Try making the substitution I suggested. I haven't gone through with the calculations but I think it works.

- #6

- 251

- 0

dang, that's a good idea.. thanks

- #7

- 10

- 0

is that should be log(2cos(x)+2)2cos(x)dx?

anyway that is good , thank you

anyway that is good , thank you

- #8

Gib Z

Homework Helper

- 3,346

- 6

And only one integration by parts is needed if you used a basic trigonometric identity, just for your information.

- #9

- 1,101

- 3

And fine, only one integration by parts was probably needed. I didn't carry out any of the calculations on paper. If I see an approach that works, then I convey it.

- #10

Gib Z

Homework Helper

- 3,346

- 6

"NOTE: You MUST show that you have attempted to answer your question in order to receive help. You MUST make use of the homework template, which automatically appears when a new topic is created in the homework help forums. "

This is one of the reasons holezch shouldn't hijack someone elses homework help thread. Either wait for the answer to come through on the thread patiently, or give someone a personal message.

Physicsforums is becoming a haven for lazy students to get their homework done for them, enabled by occurrences like this, and Its becoming worse than ever. Is anyone else getting sick of this?

Share: