IF AN A•C IS REPRESENTED BY I= IoSinwt. CALCULATE THE INSTANTANEOUS VALUE OF SUCH A CURRENT

IF AN A•C IS REPRESENTED BY I= IoSinwt. CALCULATE THE INSTANTANEOUS VALUE OF SUCH A CURRENT, IF IN A CIRCUIT IT HAS A RIMS VALUE OF 15•OA WHEN ITS PHASE ANGLE IS 30° (WAEC 1989)