$\"\"$

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The equation is $\"\"$ .

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Consider $\"\"$ .

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Substitue $\"\"$ in above equation. \ \

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$\"\"$

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$\"\"$ \ \

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Pythagorean identity : $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ . \ \

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Thus, the polar equation is $\"\"$ . $\"\"$

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The polar equation is $\"\"$ .