A traveling sine wave is the result of the superposition of two other sine waves with equal amplitudes, wavelengths, and frequencies. The two component waves each have amplitude 5.00 cm. If the superposition wave has amplitude 6.69 cm, what is the phase difference ( between the component waves? [Let y1 = A sin ((t + kx) and y2 = A sin (( t + kx − (). Make use of the trigonometric identity (Appendix A.7) for sin a + sin b when finding y = y 1 + y 2 and identify the new amplitude in terms of the original amplitude.]