A sinusoidal voltage of v(t) = 200 cos (314t) is applied to a nonlinear load, resulting in a current which is expressed in Fourier series from as i(t) = 5 + 20 cos (314t + 30°) + 20 cos[2(314)t + 45°] + 20 cos [3(314) t + 60°] . Find effective value of the current?