The tangent graph has some important features that every Year 12 student should know about:

1. Repeating Pattern: The tangent function has a repeating pattern, called a period. Its period is $\pi$, which means that the graph looks the same every $\pi$ radians.

2. Vertical Lines: There are special vertical lines called asymptotes where the tangent function does not have any value. These happen at points like $x = \frac{\pi}{2} + n\pi$, where $n$ can be any whole number.

3. Points Where It Crosses: The tangent function crosses the x-axis at certain points. These points are $x = n\pi$, where $n$ is again any whole number.

4. Curvy Shape: The graph of the tangent function has a wavy shape, moving up and down between the vertical lines (the asymptotes).

A graph example would really help to show these features!