A wave on a string is described by

D$($x$,$t$)=(3\mathrm{.}0$cm$)$D$($x$,$t$)=(3\mathrm{.}0$cm$)$

sin$[2$$($x$/(2\mathrm{.}4$m$)+$t$/(0\mathrm{.}26$s$)+1)]$sin$[2$$($x$/(2\mathrm{.}4$m$)+$t$/(0\mathrm{.}26$s$)+1)],$ where xx is in mm and tt is in ss$.$