# What would the graph of y=1/3 cosx look like?

The graph of $\frac{1}{3} \cos \left(x\right)$ looks like this:
Since it is a cosine function, it starts at its highest point, goes to zero, down to lowest point, back up to zero, then back up to highest point in a period of $2 \pi$
The Amplitude is $\frac{1}{3}$ meaning the highest point is $\frac{1}{3}$ above the midline, and the lowest point is $\frac{1}{3}$ below the midline. The midline for this equation is $y = 0$