Normal at a Point $$(x_1,y_1)$$

Rarely Tested

Normal at a Point $$(x_1,y_1)$$

For:

$$y^2=4ax$$

the normal at $$(x_1,y_1)$$ is:

$$y-y_1=-\frac{y_1}{2a}(x-x_1)$$

Usage

- Used when the point of contact on the parabola is known.

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