Rectangular coordinates: (0,-6)

Show me how to find the polar coordinates for this please.

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- Oct 3rd 2012, 12:58 AMTWNRectangular to polar coordinate conversion
Rectangular coordinates: (0,-6)

Show me how to find the polar coordinates for this please. - Oct 3rd 2012, 01:18 AMProve ItRe: Rectangular to polar coordinate conversion
Well you have not moved across at all, and gone down 6 units. Surely you can read off what the magnitude is. As for the angle, if you started from the positive x axis and went anticlockwise, what angle is swept out?

- Oct 3rd 2012, 01:31 AMTWNRe: Rectangular to polar coordinate conversion
- Oct 3rd 2012, 01:32 AMProve ItRe: Rectangular to polar coordinate conversion
- Oct 3rd 2012, 01:38 AMTWNRe: Rectangular to polar coordinate conversion
- Oct 3rd 2012, 01:51 AMProve ItRe: Rectangular to polar coordinate conversion
It's either if you move anticlockwise, or if you move clockwise. Generally we define , so choose .

Now what is r? - Oct 3rd 2012, 02:03 AMTWNRe: Rectangular to polar coordinate conversion
Would it be 6 or -6?

- Oct 3rd 2012, 02:34 AMProve ItRe: Rectangular to polar coordinate conversion
r represents the magnitude, magnitudes can never be negative.