Find a Polar Equation in R and 0 of the Parabola

question 17

Multiple Choice

Find a polar equation in r and 0 of the parabola with focus at the pole and the given vertex. $V \left( 9 , \frac { \pi } { 2 } \right)$

• A) \(r = \frac { 18 } { 1 - \cos \theta }\)
• B) \(r = \frac { 18 } { 1 + \sin \theta }\)
• C) \(r = \frac { 9 } { 1 + 9 \sin \theta }\)
• D) \(r = \frac { 9 } { 1 + \cos \theta }\)
• E) \(r = \frac { 16 } { 1 - \sin \theta }\)

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