Tangents to Parametric Curves | Multiple tangents at the same point!!

Computing Tangent Lines is a classic Calc 1 problem, but we always did it for y=f(x), when our curve was a function. Now we repeat the process but for parametric curves. This has all sorts of interesting behaviour such as that one point can have multiple tangents. The formula itself is just an application of the Chain Rule: dy/dx = (dy/dt)/(dx/dt).
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