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

Question

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

anonymous · Answer

@amistre64 or ANYONE seriously...

anonymous · Answer

Answers to choose from:

(5 , 315°), (-5 , 135°)

 (5 , 45°), (-5 , 225°)

 (5 , 135°), (-5 , 315°)

 (5 , 225°), (-5 , 45°)

amistre64 · Answer

polar coordinants have the form:  (r,angle)

r is the distance from origin, and the angle is the inverse tangent of y/x

anonymous · Answer

i still dont understand

amistre64 · Answer

might help to plot the point

amistre64 · Answer

|dw:1371142411211:dw|

amistre64 · Answer

do you know how to find the distance a point is from the origin?

anonymous · Answer

i do i just dont remember:/

amistre64 · Answer

$$d=\sqrt{x^2+y^2}$$
in this case, they like to call d ... r

amistre64 · Answer

for the angle, you will have to either see it by observation, or be able to deduce it with some inverse trig

anonymous · Answer

i think its between the first one and the third one because of how it's plotted on the unit circle