$\"\"$

The rectangular equation is $\"\"$ .

The graph of $\"\"$ is a circle with radius $\"\"$ centered at $\"\"$ .

To find the polar form of this equation replace $\"\"$ with $\"\"$ and $\"\"$ with $\"\"$ .

Now simplify the rectangular form of the equation $\"\"$ .

$\"\"$

From the trignometric identity $\"\"$ .

$\"\"$

Evaluate the function for several values of $\"\"$ in its domain and use this points to graph the function.

(1)Draw the coordinate plane.

(2)Graph the function $\"\"$ .

Graph :

$\"\"$

$\"\"$

The graph of the polar equation is a circle.

Graph :

$\"\"$