1. The problem statement, all variables and given/known data An AC current is given by I= 475 sin( 9.43 t), with I in milliamperes and t in milliseconds. Find the frequency. 2. Relevant equations w = 2pi*f 3. The attempt at a solution I got 9.43/2pi which is 1.5 Hz, but that is wrong. I honestly have no idea what to do to find the Hz.