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

Below is the graph of a trigonometric function. It intersects its midline at (3.7, 5) and again at (5.9, 5) . What is the period of the function? Give an exact value.

You can find the period by going from peak to peak, or trough to trough, or midline to midline. If you use midline of course you will need to keep in mind that you will need to skip a midline …

Sal finds the amplitude and the period of y=-0.5cos(3x).

Typically in "find the equation given 2 points," your first goal is finding the period. An useful graph @ the hints in the practice problems tremendously aided me, so I recommend using that.

Below is the graph of a trigonometric function. It has a maximum point at (1.2, 5.5) and an amplitude of 3.5 . What is the midline equation of the function?

For a sound wave, a displacement versus time graph represents what that particular air molecule is doing as a function of time, and on this type of graph, the interval between peaks represents …

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

Finding amplitude & midline of sinusoidal functions from their formulas Learn Amplitude & period of sinusoidal functions from equation

Or if you just want to think about the period here, what's the period of cosine of 1/3 x? Well the period is going to be 2 pi divided by the absolute value of this coefficient right over here.