$\"\"$

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Polar equation of the ellipse is $\"\"$ .

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The vertices on the ellipse are $\"\"$ and $\"\"$ .

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Since the one of foci is at the pole, the other focus appears to be to the left of the pole.

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Find the eccentricity $\"\"$ by substituting the points in the ellipse.

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Substitute $\"\"$ in the ellipse.

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$\"\"$

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Substitute $\"\"$ in the ellipse.

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$\"\"$

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Solve the equations $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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Consider $\"\"$ .

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

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$\"\"$

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$\"\"$ .

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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Polar equation of the ellipse is $\"\"$ .

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$\"\"$

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Polar equation of the ellipse is $\"\"$ .