Question

Integration..

Answer 1

\[\int\limits_{0}^{\infty} \frac{ \sin ^ 4 }{ x^4 }dx=?\]
Use the following
\[\int\limits_{0}^{\infty}\frac{ \sin^2 }{ x^2 }dx= \frac{ \pi }{ 2 }\]

Answer 2

Is it
\[
\Large
\frac \pi 3

\]

Answer 3

yes..how did you get that?

Answer 4

integration by parts?