$\"\"$

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The parametric equations are $\"\"$ and $\"\"$ .

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$\"\"$

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From the pythagorean identity : $\"\"$ .

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$\"\"$

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Therefore, the rectangular form is $\"\"$ .

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$\"\"$

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Graph:

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Graph the equation $\"\"$ :

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$\"\"$ .

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$\"\"$

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The rectangular form is $\"\"$ .

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Graph of the equation $\"\"$ is \ \

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$\"\"$