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Practice on sinusoidal wave

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I am given a V peak of 3.98v, and a V trough of 1.49v. I found the Amplitude to be 2.49. I am now asked to find V e = V rms and I am not sure what is being asked or how to do the problem. Please provide assistance.

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https://brainmass.com/physics/periodic-motion/practice-sinusoidal-wave-17204

Solution Summary

The solution provides practice on a sinusoidal wave and the answer is given succinctly.

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