### Home > CALC > Chapter 8 > Lesson 8.3.3 > Problem 8-131

8-131.

A 'Normal line' is perpendicular to a 'tangent line' at the point of tangency. So first find the equation of the tangent line, then manipulate its slope.

8-131.

A 'Normal line' is perpendicular to a 'tangent line' at the point of tangency. So first find the equation of the tangent line, then manipulate its slope.