$\"\"$

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The polar coordinates is $\"\"$ .

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Rectangular coordinates: $\"\"$ and $\"\"$ .

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Consider $\"\"$ .

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Substitute $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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Consider $\"\"$ .

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Substitute $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$ .

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The rectangular coordinates are $\"\"$ .

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$\"\"$

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Rectangular coordinates are $\"\"$ .