$\"\"$ \ \

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The rectangular equation is $\"\"$ .

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Rewrite the equation as $\"\"$ .

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The rectangular equation is in the form of standard form of circle equation $\"\"$ , where $\"\"$ is the center of the circle and $\"\"$ is the radius.

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Here, $\"\"$ and $\"\"$ .

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The graph of $\"\"$ is a circle with center $\"\"$ and radius $\"\"$ .

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$\"\"$

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Convert the rectangular equation into polar equation.

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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The polar equation is $\"\"$ .

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$\"\"$

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

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Graph:

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$\"\"$

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Observe the graph:

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The graph is similar to the graph of $\"\"$ is a circle with center $\"\"$ and radius $\"\"$ .

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$\"\"$

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The graph of $\"\"$ is a circle with center $\"\"$ and radius $\"\"$ .

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The polar equation is $\"\"$ .

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

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Graph:

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$\"\"$ \ \