EZ Graph - Cosine Function, Horizontal Translation Variable

Click the 'Draw graph' button in the lower left corner of the EZ Graph app. Explanation below.

Here is the conventional notation for this cosine function and the computer language type of notation used with EZ Graph:

 

f1(x) = cos(x - h) translates to EZ Graph as f1(x) = cos(x - h)
f2(x) = cos(x) translates to EZ Graph as f2(x) = cos(x)

 

The two notations are the same for this example.