Two waves are oscillating on the same string, with the equations
y1(x,t) = (1.5 cm)sin((1.2 s-1)t - (5.2 m-1)x)
y2(x,t) = (5.2 cm)sin((2.3 s-1)t - (2.3 m-1)x)
What will the displacement of the string be at x = 3 m and t = 5 s?
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