Question

Which of the following is another representation of the point (1, 90°)?


(1, 450°)

(1, -90°)

(-1, 180°)

(1, 270°)

Answer 1

if you add or subtract 360° to any radial coordinate system it does not change the vector/coordinate.

Answer 2

so what I'm saying is (1,90°+or -360°) = (1,90°)

Answer 3

okay thanks! can i do this to any problem?

Answer 4

like that doesn't work with this one:
Which of the following is another representation of the point (4, -30°)?


(-4, -30°)

(4, 150°)

(-4, 120°)

(-4, 150°)

Answer 5

(4,30°) = (-4,30°+or- 180°)
Because when you change 4 to a negative then the direction gets flipped 180°

Answer 6

Yes you can do either of those things to any problem.

Answer 7

okay thanks

Answer 8

Yup!