Two waves, y1 (t) and y2 (t), have identical amplitudes and
Two waves, y1 (t) and y2 (t), have identical amplitudes and oscillate at the same frequency, but y2 (t) leads y1 (t) by a phase angle of 60o. If y1 (t) = 4cos (2Ď x 103t) write down the expression appropriate for y2 (t) and plot both functions over the time span from 0 to 2 ms.
