Eliminate the parameter to find a Cartesian equation of the curve

cartesian-equation

#1

(a) Eliminate the parameter to find a Cartesian equation of the curve.
(b) Sketch the curve and indicate with an arrow the direction in which the curve is traced as the parameter increases.
x = Sin 1/2 θ, y = cos 1/2 θ, - π ≤ θ ≤ π

Answer:

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2)
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