$\"\"$

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The polar equation is $\"\"$ .

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Convert the polar equation into rectangular form.

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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Square on both sides.

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$\"\"$

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$\"\"$

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Substitute $\"\"$ , $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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The rectangular equation is $\"\"$ .

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$\"\"$

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The rectangular equation is $\"\"$ .