6. Trace the curve: r² = a² (1 + 2 cos ) → (degrees) r Ⓒ (degrees) r → (degrees) r → (degrees) r 150° 165° 180° 195° 210 225 0 90 180 135° 270 120° 240 15 105 195 285 105° 255° 30 120 210 300 90° 270° 45 135 225 315 75° 285° 150 60 240 330 60° 300⁰ 45° 315° 75 165 255 345 30° 15° 40° 345⁰ 330⁰

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