I have a parametrically defined curve where i am trying to find the second derivative.

here is the problem:

and

I need to find the equation for the tangent line to the curve at the point defined by t = 1

finding

the dirivitive of x =

the dirivitive of y =

then, i evaluate t = 1 by plugging it into

Sorry having some formatting issues below i hope you can read it..

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after plugging in 1 for t

I get a slope of -1

so, then i need to take a second derivative

for the numerator its just 1

for the denominator its the derivative of x =

if so how do i evaluate that?