Step 1:

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Conversion from rectangular to polar equation :

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The equation rectangular form is $\"\"$ .

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Substitute for $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Apply double-angle formula $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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Solution:

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The equation in polar form is $\"\"$ .