Upgrade subject to access all content

An alternating current is flowing in a wire according to the equation $I=I_0 sin(2\pi f t)$.

What is the average value of the current, $I_{av}$ over a complete cycle of oscillation?

$I_{av}=2 \pi$

$I_{av}=1$

$I_{av}=\pi$

$I_{av}=0$