Question

Determine two pairs of polar coordinates for the point (5, -5) with 0° ≤ θ < 360°.

(5 √2, 315°), (-5 √2, 135°)

(5 √2, 45°), (-5 √2, 225°)

(5 √2, 135°), (-5 √2, 315°)

(5 √2, 225°), (-5 √2, 45°)

Answer 1

x= rcos(theta)
y= rsin(theta)
arctan(y/x)= theta

Answer 2

What does that mean? Please explain

Answer 3

Ok, do you how to convert from cartesian to polar coordinates?

Answer 4

I think so

Answer 5

Ok, so how do you go from x= 5 to r= ?

Answer 6

um, you would use x=rcos(theta) to suggest that 5=rcos(theta) then get r by itself?

Answer 7

Umm, 5 = rcos(theta)

Answer 8

x^2 + y^2 = r^2

thus you can find your r value and theta

Answer 9

What?

Answer 10

The question is asking you to find r and theta

Answer 11

Ill walk you through it.

Answer 12

okay