$($c$)$ A progressive wave is represented by the equation

$y(x,t)=9sin(t-x)$

where $y$ and $x$ are in centimeters and $t$ in seconds. Determine the:

$($i$)$ angular frequency,

$[1$ mark$]$

$($ii$)$ wavelength,

$[1$ mark$]$

SP$014$

$7$

INDEX NUMBER: $q,$

$($iii$)$period$,$

$[1$ mark$]$

$q,$

$q,$

$($iv$)$frequency

$[1$ mark$]$

$q,$

$q,$

$q,$

$q,$

$q,$