Sinusoidal functions are something that repeats the same pattern. An example of this is like a ferris wheel where it repeats the same motion over and over again. This motion will follow a periodic pattern. A ferris wheel will move in a circular motion, for example: This ferris wheel will have a radius of 30 meters and it takes 1 minute to complete one circular rotation. When the ferris wheel reaches the bottom, it remains 5 meters above the ground