$\"\"$

The polar equation for each graph is either $\"\"$ or $\"\"$ .

Observe the graph :

Since the equation represent in the graph is in vertical plane the graph is $\"\"$ .

The point on the graph is $\"\"$ and $\"\"$

Where $\"\"$ and $\"\"$ .

$\"\"$

From the trignometric table : $\"\"$ .

$\"\"$

Substitute the values $\"\"$ and $\"\"$ in equation $\"\"$ .

$\"\"$

The equation that represents the graph is $\"\"$ .