Tangents of Parametric Curves - USM

The curve is illustrated in Figure 1. 2 Figure 1: Graph of the parametric curve x= t2, y= (t2 4)sint. In order to graph curves, it is helpful to know where the curve is concave up or concave down. For a curve de ned by y= f(x), this is determined by computing its second derivative d2y=dx2 = f00(x) and checking its sign. ................
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