## Overview

Early in the course we discussed limits and things that could go wrong when trying to compute them. For example, we might end up trying to divide zero by zero when calculating a limit. L’Hospital’s rule is the tool we employ when this is unavoidable.

## Lecture Video and Notes

### Video Excerpts

Clip 1: Introduction to L'Hospital's Rule

Clip 2: Elementary Example of L'Hospital's Rule

## Worked Example

sin x/(1 − cos x) as x Approaches 0

## Lecture Video and Notes

### Video Excerpts

Clip 1: Why L'Hospital's Rule Works