$\"\"$

The polar equation is $\"\"$ .

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

Graph the rectangular function $\"\"$ on the interval $\"\"$ .

$\"\"$

Observe the graph :

$\"\"$ when $\"\"$ and $\"\"$ .

$\"\"$

Since polar equation is symmetric with respect to the polar axis, construct a table and calculate the values of $\"\"$ on $\"\"$ .

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

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

Graph :

1. Draw a polarcoordinate plane.

2. Plot the coordinate points.

3. Then sketch the graph, connecting the points with a smooth curve.

$\"\"$

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

$\"\"$