Question

In calculus, how do you find the normal line equation when given the tangent line equation

Answer 1

normal line means perpendicular line

Answer 2

^does that help?

Answer 3

normal line = \[-1/ f'(a) \]

Answer 4

When you have a line in point-slope form,\[y-y_0=m(x-x_0)\]the unique line perpendicular to it is given as follows.\[y-y_0=-\frac{1}{m}(x-x_0)\]This is jus more of a line geometry problem than a calculus problem.

Answer 5

@yakeyglee You actually have this in calculus.

Answer 6

Thank you all :D

Answer 7

No problem.

Answer 8

@beeqay - What I meant was that it wasn't a calculus technique.

Answer 9

the normal line is the one that isn't abnormal...:)