Question

Which of the following is another representation of the point (4, -30°)?


(4, 150°)

(-4, -30°)

(-4, 120°)

(-4, 150°)

Answer 1

This problem involves converting a point expressed in polar coordinates with a negative angle to the same point expressed in polar coord. with a positive angle. You might try sketching this situation; you may then see from your own sketch what the correct answer is.

Answer 2

I'm not sure how to do this... can you please help me?

Answer 3

Have you sketched a point expressed in polar coordinates before?

Answer 4

no

Answer 5

When a new topic is introduced in your online course, to what resources (other than Open Study) do you turn to for explanations and examples?

Answer 6

Which of the following is another representation of the point (4, -30°)? Can you please explain to me how I would find my answer? I have examples online that goes with my online course and it doesn't show them graphing it to find the answer...

Answer 7

In (4,-30 deg), the polar coordinate representation of a point, we have a ray coming out from the origin and with length 4. We move from the positive x-axis clockwise by 30 degrees. An appropriate sketch follows:

Answer 8

ok

Answer 9

I understand the look of the graph that you drew in relationship to the coordinates

Answer 10

I need a minute to think; something about the question doesn't look quite right. While I'm doing that, please double check to ensure you've copied down all of the problem correctly.

Answer 11

I am positive I have

Answer 12

Here is one of my examples I was given:
Name 3 different representations of P(3, 60°).

a. (3, -300°)

b. (-3, 240°)

c. (3, 420°)

These are just three possible answers.

Answer 13

OK: you seem to have copied your math problem correctly. I have drawn an arrow in that diagram. Would you please copy my diagram, and then draw in an arrow from the origin in the opposite direction from that of the ray I've drawn? Don't be afraid to make a mistake...just go ahead with this as a first effort.