14. Find the cube roots of 1 + 1. Leave the answers in polar form. What is one answer? A. V2(cos 15 + /sin 15) B. 2(cos 45 + /sin 45) C. 2(cos 15/sin 15) D. 2(cos 45 + i sin 45) 15. Transform from rectangular coordinates to polar coordinates: (-1, -3) A. (2, 240) B. (2, 60) C. (-2, 30) D. (2, 60) 16. Transform from polar coordinates to rectangular coordinates: (-2, 270) A. (-2, 2) B. (2,-2) C. (0,-2) D. (0, 2) 17. Perform the indicated operation, leave the answers in the rectangular form a + bi. (3 21) (2 7i) - - A. 1 + 9 i B. 1-9 i C. 1-5 i D. 1 + 5 i 18. Two vectors 6 and 11 centimeters in length form an angle of 65 with each other. What is the magnitude of the resultant vector? A. 10.1 cm B. 17 cm C. 12.5 cm D. 14.6 cm 19. Change each number to algebraic form: 3(cos 90 + i sin 90) A. 31 B. 3 + 31 C. 1-31 D.-31