APFIVE Second Derivative of a Parametric Equation
If $$\displaystyle\frac{dx}{dt} = 3$$ and $$\displaystyle\frac{dy}{dt} = \cos(2t)$$, then $$\displaystyle\frac{d^2y}{dx^2}$$ is
A
$$\displaystyle\frac{-2\sin(2t)}{9}$$
B
$$\displaystyle\frac{2\sin(2t)}{9}$$
C
$$\displaystyle\frac{-2\sin(2t)}{3}$$
D
$$-2\sin(2t)$$
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