Pre-calc polar coordiantes?

M

matthardy1love

New member
So the problem is asking to plot each point whose coordinates are given. Then give two other pairs of polar coordinates for the point.

The problems are:
A(2,40degrees)

B(3,-100degrees)

C(5,3pi/2)

D(-4,10degrees)

The answers are as follow:
A (2,400degrees), (-2,220degrees)
B (3,260degrees), (-3,80degrees)
C (5,pi/2), (-5,pi/2)
D (4,190degrees), (-4,370degrees)

I understand how to draw them and the first answers for each point but I don't know why the second answers work.
Could someone explain?

THANKS!!
 
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