\"\"

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The rectangular equation is y = 1.

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Apply formula: \"\"

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\"\"                                                (Substitute : y = 1)

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\"\"                                    (Substitute : \"\")

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\"\" \ \

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\"\" \"\"

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\"\"                                     (Take out common factor)

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\"\"                                            (Pythagorean identity: \"\")

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\"\" \ \

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\"\"

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\"\"                                                    (Reciprocal identity: \"\")

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The polar form is \"\".\"\"

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The polar form is \"\".