$9\mathrm{.}2$ Consider the sinusoidal voltage

v$($t$)=25$cos$(400$t$+60)$V$.$v$($t$)=25\backslash$cos$(400\backslash$pi t $+60^\backslash$circ$)\backslash ,\backslash$text$\{$V$\}.$v$($t$)=25$cos$(400$t$+60)$V$.$

$($a$)$ What is the maximum amplitude of the voltage?

$($b$)$ What is the frequency in hertz?

$($c$)$ What is the frequency in radians per second?

$($d$)$ What is the phase angle in radians?

$($e$)$ What is the phase angle in degrees?

$($f$)$ What is the period in milliseconds?

$($g$)$ What is the first time after t$=0$t $=0$t$=0$ that v$=0$Vv $=0\backslash ,\backslash$text$\{$V$\}$v$=0$V$?$

$($h$)$ The sinusoidal function is shifted $5/6$ms$5/6\backslash ,\backslash$text$\{$ms$\}5/6$ms to the right along the time axis. What is the expression for v$($t$)$v$($t$)$v$($t$)?$

$($i$)$ What is the minimum number of milliseconds that the function must be shifted to the left if the expression for v$($t$)$v$($t$)$v$($t$)$ is $25$sin$(400$t$)$V$25\backslash$sin$(400\backslash$pi t$)\backslash ,\backslash$text$\{$V$\}25$sin$(400$t$)$V$?$