$9\mathrm{.}1$ Consider the sinusoidal voltageu$($r$)=40$ cos$(100-609)$ V$.$a$)$ What is the maximum amplitude of the voltage?b$)$ What is the frequency in hertz?c$)$ What is the Irequency in radians per second?d$)$ What is the phase angle in radians?e$)$ What is the phase angle in degrees?$1)$ What is the period in milliseconds?$9)$ What is the fist time alter? $=$ Othat a $=-40$ V$7$h$)$ The sinuscidal function is shifted $10/3$ ms to the right along the time axis. What is the expression for no$?$What is the minimum number of milliseconds that the function must be shifted to the left if the expression for fr$)$ is $40$ sin $100$m V$?9\mathrm{.}2$ A sinusoidal voltage is given by the expression