$\"\"$

The parametric equations of cycloid are $\"\"$ and $\"\"$ .

Graph:

Graph the parametric equations $\"\"$ and $\"\"$ .

$\"\"$ .

Observe the graph:

The graph is not smooth and discontinuous at $\"\"$ .

Therefore, the graph is discontinuous at $\"\"$ .

$\"\"$

Graph of the parametric equations $\"\"$ and $\"\"$ .

$\"\"$ .

The graph is not smooth and discontinuous at $\"\"$ .