How do you find the amplitude of a trig graph? To find the amplitude of a trig graph, first, determine the max and min values. From there, either take half the difference of the max and min values or find the midline and determine the distance between the midline and the max value. ...
You do not need add rectangles, you can add a dimensions directly to a point of a curve. you can add points and add constraints. If you do not feel good making a sin wave like that. You coudl try "Driven equation" add-in You could find it in autode...