1.
Consider the three waves represented by y1=3sin(kxωt)y_1 = 3\sin(kx - \omega t), y2=3sin(kxωt+2π3)y_2 = 3\sin\left(kx - \omega t + \dfrac{2\pi}{3}\right), and y3=3sin(kxωt+4π3)y_3 = 3\sin\left(kx - \omega t + \dfrac{4\pi}{3}\right). What is the amplitude of the resultant of the waves at x=0x = 0?