Find $d\frac{y}{d}x$ without eliminating the parameter.

$x=4cost,y=6cos(2t)$

A$)\frac{1}{6cost}$

B$)6cost$

C$)6sint$

D$)6sintcost$

$x=\frac{1}{t^6},y=-3+lnt$

A$)-\frac{1}{6t^6}$

B$)-\frac{6}{t^6}$

C$)-\frac{t^6}{6}$

D$)-\frac{t^7}{6}$

$x=ln(5t),y=e^{5t}$

A$)t{e}^{5t}$

B$)\frac{5e^{5t}}{t}$

C$)5t{e}^{5t}$

D$)\frac{1}{5t{e}^{5t}}$