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A wave on a string is described by the equation y = 12 cos(1.57 x -...

A wave on a string is described by the equation y = 12 cos(1.57 x - 6.28 t). The lengths are measured in cm and time in s. Determine; (a) the amplitude, frequency, and the time it takes for the wave repeats itself, (b) the speed of the wave and the distance a peak of the wave travels in 3 T + .5 s. (c) Paint a point on this string. What length does this point move in 2.5 s.

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