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10 cards from this deck
Removing the parameter ttt to find a direct relationship between xxx and yyy
A single Cartesian equation in xxx and yyy
x=f(t)x = f(t)x=f(t) and y=g(t)y = g(t)y=g(t)
Choose the simpler one
Substitute into other equation
sin2t+cos2t=1\sin^2 t + \cos^2 t = 1sin2t+cos2t=1
Square both equations, then add
x2+y2=1x^2 + y^2 = 1x2+y2=1
Circle with centre (0,0)(0,0)(0,0), radius 111
Move between parametric & Cartesian forms
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