Find the Distance from the Pole to the Directrix $$r = - \frac { 30 } { 15 + 31 \sin \theta }$$

question 75

Multiple Choice

Find the distance from the pole to the directrix for the conic $$r = - \frac { 30 } { 15 + 31 \sin \theta }$$

• A) \(\frac { 30 } { 31 }\)
• B) \(\frac { 31 } { 30 }\)
• C) 30
• D) \(\frac { 31 } { 15 }\)
• E) 62

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