Question

3 part

Answer 1

@Vocaloid

Answer 2

infinity is not an appropriate angle value

try sketching the point (0,7) to see what the angle is

Answer 3

pi/4

Answer 4

90

Answer 5

good, or in other words, pi/2

so then for part II put your coordinates together to get a new (r, theta) value

Answer 6

pi/6

Answer 7

r = 7 and theta = pi/2

therefore your new (r, theta) is just (7,pi/2)