$\"\"$

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Rectangular coordinates are $\"\"$ and the interval is $\"\"$ .

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Find polar coordinates $\"\"$ .

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Find $\"\"$ :

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$\"\"$ .

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Substitute $\"\"$ in the above equation.

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$\"\"$

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$\"\"$

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Find $\"\"$ :

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$\"\"$

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Since $\"\"$ , the angle is $\"\"$ .

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Substitute $\"\"$ in the above equation.

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$\"\"$

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One set of polar coordinates is $\"\"$ . \ \ Another representation that uses a negative $\"\"$ -value is $\"\"$ or $\"\"$ .

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Therefore, two polar coordinates are $\"\"$ and $\"\"$ .

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$\"\"$

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The two polar coordinates are $\"\"$ and $\"\"$ .