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Sketch the curve given by the parametric equation x= tan(t) , y=sec (t) for -pi/2 <...

Sketch the curve given by the parametric equation x= tan(t) , y=sec (t) for -pi/2 < t < pi/2. Eliminate the parameter "t" and find the Cartesian form of this curve. What type of curve is this? What curve would be good if "t" belong to the interval (pi/2, 3pi/2)?

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