Parametiric equations For the first set of parametric equations, x = sin z and y = cos z , where z is a parameter. What is the locus of the point P(x , y) when z varies? For the second set of parametric equations, x = cos z and y = sin z , where z is a parameter. What is the locus of the point Q(x , y) when z varies? Click the "Hide" button and the red cross at the right bottom corner to erase the trace.

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