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      <text>11.6.0 Introduction</text>
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      <text><![CDATA[<h4>Parametric Differentiation</h4>

Sometimes the equation of a curve is not be given in Cartesian form \(y = f(x)\) but in parametric form:
\(x = h(t)\), \(y = g(t)\). In this Section we see how to calculate the derivative \( \dfrac{dy}{dx}\) from a knowledge of the so-called parametric derivatives \( \dfrac{dx}{dt}\) and\( \dfrac{dy}{dt} \). We then extend this to the determination of the second derivative \( \dfrac{d^2y}{dx^2}\).
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Parametric functions arise often in particle dynamics in which the parameter \(t\) represents the time
and \((x(t), y(t))\) then represents the position of a particle as it varies with time.]]></text>
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