Parametric Equation Homework: Halfway Around Circle

[notebook3]

Homework Statement

Find parametric equations for the path of a particle that moves around the given circle in the manner described.

x^2 + (y-2)^2 =4

Homework Equations

halfway around counterclockwise, starting at (0,4).
x(t)= ?
y(t)= ?

The Attempt at a Solution

unsure where to begin...

 

[rock.freak667]

a(sin²θ+cos²θ)=a

is what you want to have happening with your parametric equation here. So what is x(θ) and y(θ) ?