shell method question: x = √cos 8y -pi/8≦y≦pi/8 , and x = 0 about the line x =4?

[khen]

shell method question: x = √cos 8y -pi/8≦y≦pi/8 , and x = 0 about the line x =4?

Use shell method to express the volume of the solid obtained by rotating the region bounded by the curves x = √cos 8y
-pi/8≦y≦pi/8 , and x = 0 about the line x =4?
no need to compute the integral

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Thank you so much

 

[Deleted member 4993]

Use shell method to express the volume of the solid obtained by rotating the region bounded by the curves x = √cos 8y
-pi/8≦y≦-pi/8 , and x = 0 about the line x =4?
no need to compute the integral

--

Thank you so much

First - plot x = √[cos(8y)] within the given domain? What are your thoughts?

Please share your work with us ...even if you know it is wrong.

If you are stuck at the beginning tell us and we'll start with the definitions.

You need to read the rules of this forum. Please read the post titled "Read before Posting" at the following URL:

http://www.freemathhelp.com/forum/announcement.php?f=33

By the way:

Are you sure the domain is -pi/8 ≦ y ≦-pi/8?

 

[khen]

I am so sorry there are some mistakes

here is the picture of this question

i try to ans this but i don't think its the right answer;

i also apologize that sumbit post without brain and read the forum rules first,
and English not my main language

Thank you

 

[HallsofIvy]

Show us how you obtained that answer and what your reasoning is.