You don't need to. You can just look at the equation and see the amplitude and period from there. Like if you have y=3sin (πx), you can see that the amplitude is 3, and you can just divide 2pi …

David defines the terms amplitude and period for simple harmonic motion and shows how to find them on a graph.

How to find the amplitude, period, frequency, and wavelength for a sound wave. Created by David SantoPietro.

Review the basic features of sinusoidal functions: midline, amplitude, and period.

A wave's amplitude is the maximum change from equilibrium that it causes. To visualize the amplitude of water waves, we need to view them from a different perspective.

Practice using the wave speed equation for word problems to find the frequency and wavelength of a wave.

Introduction to radians The unit circle definition of sine, cosine, & tangent The graphs of sine, cosine, & tangent Basic trigonometric identities Trigonometric values of special angles …

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Amplitude is simply the distance away from the center line that the tips of the peaks/troughs of the graph are. Because it's a distance, it can't be negative at all.

Below is the graph of a trigonometric function. It intersects its midline at (2 3 π, 1.2) , and it has a minimum point at (4 3 π, 3.4) . What is the amplitude of the function? units