solve in the interval (0,8pi)

sin(x/4)=0    solve in the interval (0,8pi)

$sin\ \frac{x}{4}=0$

$\frac{x}{4}=arcsin\ 0$

${\color{blue}x= 4\times arcsin \ 0=4\times 0}$

${\color{blue}x= 0}$     !