At which three points $,,$ and closest to but with will the displacement of the string be zero for all times? These

are the first three nodal points.

This wave is traveling toward $+$x

This wave is traveling toward $.$x

This wave is oscillating but not traveling.

This wave is traveling but not oscillating.

t $=0$ y $($x$,0)$

A k

x T $/4$ T

A x k $$ T

$4$ y $($x$,$ t$)$

T

sin$($ $)$T

$4$

sin$($t$)$ T $/4$

x$1$ x$2$ x$3$ x $=0$ x $>0$ y $($x$,$ t$)$