- #1
Feldoh
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My book really doesn't go into a lot of depth but I was wondering if this is correct
If we are asked to find the tangent line of a specific value of t for a given parametric equation then we can find the equation of the tangent line in either rectangular or parametric functions.
Rectangular Mode
We need dy/dx and the point at the specific t value, say [itex](x_o,y_o)[/itex] is our point.
The tangent line is:
[tex]y-y_o = \frac{dy}{dx}(x-x_o)[/tex]
Parametric Mode
We need dy/dt, dx/dt, and the point at the specific t value, once again say [itex](x_o,y_o)[/itex].
[tex]x(t) = \frac{dx}{dt}t+x_o[/tex]
[tex]y(t) = \frac{dy}{dt}t+y_o[/tex]
Is that correct?
Also could someone explain how we derive dy/dx and d^2y/dx^2?
If we are asked to find the tangent line of a specific value of t for a given parametric equation then we can find the equation of the tangent line in either rectangular or parametric functions.
Rectangular Mode
We need dy/dx and the point at the specific t value, say [itex](x_o,y_o)[/itex] is our point.
The tangent line is:
[tex]y-y_o = \frac{dy}{dx}(x-x_o)[/tex]
Parametric Mode
We need dy/dt, dx/dt, and the point at the specific t value, once again say [itex](x_o,y_o)[/itex].
[tex]x(t) = \frac{dx}{dt}t+x_o[/tex]
[tex]y(t) = \frac{dy}{dt}t+y_o[/tex]
Is that correct?
Also could someone explain how we derive dy/dx and d^2y/dx^2?