An electromagnetic wave is given in SI units by E$($x$,$ t$)=4\mathrm{.}55$ sin$(0\mathrm{.}62$x $$t$)$ V$/$m$.$

$($a$)$ What is the angular frequency?

rad$/$s

$($b$)$ What is the magnetic field at

x $=2\mathrm{.}0$ m

and

t $=3\mathrm{.}0$ s$?$

T