11. 2 r< 3, 5T/30 7T/3 12. r 1, mT 2T 13. Find the distance between the points with polar coordinates (4, 4TT/3) and (6, 5T/3). 14. Find a formula for the distance between the points with polar coordinates (r1, 01) and (r2, 02). 8TBRUD 15-20 Identify the curve by finding a Cartesian equation for the curve. 15. r25 16. r 4 sec 0 17. r 5 cos 18. 0 TT/3 19. r2cos 20 = 1 20. r sin 20 1

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