Polar Coordinates: Traveling Clockwise from (0,-1) to (0,1)

phamdat1202
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Homework Statement


the circle travels clockwise from (0,-1) to (0,1)
write down the parameterization in term of t

Homework Equations


The Attempt at a Solution


x=cost(t)
y=-sin(t)

i'm not sure about the sign of the polar coordinate, how to find the sign?
 
Last edited:
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Think about the extremes, what should the values be at t = 0? what about t = pi?
 

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