Answer
$V = -337*sin(377*t + \pi/6)$ (Volts)
Work Step by Step
Start with the equation $V = L * \frac{di}{dt}$
$L = 0.5H$
Take the derivative of the given current through the inductor to find the voltage
$ V = 0.5*(-2*377*sin(377*t +\pi/6))$
$V = -377*sin(377*t+\pi/6)$ Volts
