A current source in a linear circuit has

is $15$ cos$(25$p t$25)$ A

v$($t$)$ t $10$ ms$.$

Vm$,$

$50$ cos$(30$t $10)$ V$,$

v$($t$)$

$($a$)$ What is the amplitude of the current?

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

$($c$)$ Find the frequency of the current.

$($d$)$ Calculate at i