Two Traveling Sinusoidal Waves Interfere to Produce a Wave with the Mathematical

Multiple Choice

Two traveling sinusoidal waves interfere to produce a wave with the mathematical form If the value of $\phi$ is appropriately chosen, the two waves might be:

A) y₁(x,t) = (y_m/3) sin (kx + $\omega$ t) and y₂(x,t) = (y_m/3) sin (kx + $\omega$ t + $\phi$ )
B) y₁(x,t) = 0.7y_m sin (kx - $\omega$ t) and y₂(x,t) = 0.7y_m sin (kx - $\omega$ t + $\phi$ )
C) y₁(x,t) = 0.7y_m sin (kx - $\omega$ t) and y₂(x,t) = 0.7y_m sin (kx + $\omega$ t + $\phi$ )
D) y₁(x,t) = 0.7y_m sin [(kx/2) - ( $\omega$ t/2) ] and y₂(x,t) = 0.7y_m sin [(kx/2) - ( $\omega$ t/2) + $\phi$ ]
E) y₁(x,t) = 0.7y_m sin (kx + $\omega$ t) and y₂(x,t) = 0.7y_m sin (kx + $\omega$ t + $\phi$ )