Derivative as a Rate Measure, Tangents and Normals
2.0 Tangent and Normal
2.0 Tangent and Normal
Let us assume a function defined by $y=f(x)$ and the curve is shown in figure. Consider any point $P({x_1},{y_1})$ on the curve
and draw a line touching the curve only at a point $P$, then that line is tangent to the curve.
and draw a line touching the curve only at a point $P$, then that line is tangent to the curve.A line through point $P$ and perpendicular to the tangent is called the normal to the curve at point $P$.
