Phase shift and sinusoidal curve fitting - Finding .

1. Jun 27, 2011

nukeman

Phase shift and sinusoidal curve fitting - Finding.....

1. The problem statement, all variables and given/known data

"Find the period, amplitude, and phase shift of each function. Graph each function. Be sure to label key points"

y = 4sin(2x - pi)

2. Relevant equations

3. The attempt at a solution

So, I got...

Amplitude = 4
Period = 2pi/2 = 2

Phase shift: Would that be pheta/w ?, So pi/2 ?

Now here is where I get messed up.

I do not know how to get "Interval defining one cycle" and "Subinterval width"

How do I generate points from this?

2. Jun 27, 2011

Staff: Mentor

Re: Phase shift and sinusoidal curve fitting - Finding.....

First step: Graph paper. Sharp pencil. Eraser. Calculator. Plot points in steps of, say 0.1 radian, for x from 0 to 2Pi radians, plotting y vs. x

Then, complete the plot from 0 back to -Pi radians.

Do this neatly & well, and you'll discover a lot.

Last edited: Jun 27, 2011