Substitute into the complex ratio equation:
				$$H = {Z_C \over {Z_R+Z_C}} = {{1 \over {j \omega C}} \over {R + {1 \over {j \omega C}}}} = {1 \over { 1+ j \omega RC}}$$
				
				Thus the input and output phasors are:
				$$
				V_i = 1 + \omega R C j\\
				V_o = 1 + 0j
				$$