$\"\"$

The function is $\"\"$ .

The equation is of the form $\"\"$ and $\"\"$ , so its graph is a cardioid.

The function represents a cardioid.

Because this polar equation is a function of the cosine function, it is symmetric with respect to the polar axis.

Graph the polar equation $\"\"$ .

Construct a table and calculate the values of $\"\"$ on $\"\"$ .

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\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$
$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$	$\"\"$

$\"\"$

Graph :

Draw polar coordinate plane.

Plot the points obtained in the table.

Graph the polar equation $\"\"$ .

$\"\"$

Graph of the polar equation $\"\"$ :

$\"\"$

The function represents a cardioid.