Question

Determine two pairs of polar coordinates for the point (4, -4) with 0° ≤ θ < 360°.

Can somebody please help? I don't understand.

Answer 1

@emcrazy14 @deinomios @norasparkle4

Answer 2

@zepdrix

Answer 3

@experimentX

Answer 4

@DanielM_113

Answer 5

Do you know the equations for polar coordinates?

Answer 6

I don't think so

Answer 7

Do you know what they mean?

Answer 8

http://en.wikipedia.org/wiki/Polar_coordinate_system#Converting_between_polar_and_Cartesian_coordinates

Answer 9

Ok so now what do i do?

Answer 10

Now you convert the given point to polar coordinates if you understand what polar coordinates mean. Point(4,-4) or x=4 and y=-4, turn that into r and \(\theta\).

Answer 11

so is the answer (4 sqrt 2, 135 degrees), (-4 sqrt 2, 315 degrees)?

Answer 12

I am not sure. Let me check.

Answer 13

ok thanks so much! I really appreciate it!

Answer 14

Yes, your answer is correct.

Answer 15

Thank you so much!

Answer 16

You are welcome.

Answer 17

Could you help me with one more?

Answer 18

@DanielM_113

Answer 19

Yes, what is the question?

Answer 20

Find all polar coordinates of point P where P = (9, pi/5) @DanielM_113

Answer 21

You use the same equations as before, but now x=9 and y=\(\pi\)/5

Answer 22

Is the answer (9, pi/5 + 2nπ) or (-9, pi/5 + 2nπ)?

Answer 23

\[ r=\sqrt{9^2+\frac{\pi}{5}}\]
hmm, if that is supposed to be the answer I misunderstood the question.
If the point P is already in polar coordinates than your answer is correct.

Answer 24

I think it is. Thank you for your help!!

Answer 25

The way you understood makes much more sense, I must have understood the problem wrong.

Answer 26

No problem.