Find a Polar Equation for the Circle $$( x + 9 ) ^ { 2 } + y ^ { 2 } = 81$$

question 332

Multiple Choice

Find a polar equation for the circle.
- $$( x + 9 ) ^ { 2 } + y ^ { 2 } = 81$$

• A) \(r \cos \theta = - 18\)
• B) \(r = - 18 \sin \theta\)
• C) \(\mathrm { r } = 18 \cos \theta\)
• D) \(r = - 18 \cos \theta\)

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