- #1
Yae Miteo
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Homework Statement
Find parametric equations for the tangent line to the curve with the given parametric equations at the specified point.
Homework Equations
[tex] x = 1+2 \sqrt{t}, \quad y = t^3 - t, \quad z = t^3 + t, \quad (3, 0, 2) [/tex]
The Attempt at a Solution
I began by re-writing this as [tex] \vec{r}(t) = <1+2 \sqrt{t}, \quad t^3 - t, \quad t^3 + t > [/tex]
and then taking the derivative to find the normal vector: [tex] \vec{r}(t) = <1/ \sqrt{t}, \quad 3t^2 - 1, \quad 3t^2 + 1> [/tex]. From here, I tried plugging in (3, 0, 2) into each of the components for the derivative, but that hasn't worked. I think I need to find a value to use for "t" and then put that into the normal vector, but I am not sure how.