Question

Find area of the reigon by revolving it around the x-axis

Answer 1

\[y=\sqrt{\cos(x)}\]
\[y=0\]
\[x=0\]
\[x=\frac{ \pi }{ 4 }\]

Answer 2

Is this simply:

\[\int\limits_{0}^{\frac{ \pi }{ 4 }}\pi(\sqrt{\cos(x)} )^2\]

Answer 3

are these the washer or disk method ?

Answer 4

disk i believe

Answer 5

okay ill try lol one sec

Answer 6

thanks, you're taking calc II right now too arent you?

Answer 7

yes i struggled but ill try lol

Answer 8

i got \[\frac{ \sqrt{2} }{ 2 }\pi\]