Atransverse wave on a rope is given by y(x, t)= (0.750cm)cos(π[(0.400cm−1)x+(250s−1 )t]). part a part complete find the amplitude.

The amplitude of a wave corresponds to its maximum oscillation of the wave itself. 
In our problem, the equation of the wave is

We can see that the maximum value of y(x,t) is reached when the cosine is equal to 1. When this condition occurs,

and therefore this value corresponds to the amplitude of the wave.

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