## Limits Involving Infinity – Limits and Continuity

Limits Involving Infinity Let’s start with what we mean when we say $$\displaystyle \lim_{x \to\infty} f(x) = L$$ or $$\displaystyle \lim_{x \to-\infty} f(x) = L$$. We say $$f(x)$$ has limit $$L$$ as $$x$$ approaches infinity ($$\infty$$) and write $$\displaystyle \lim_{x \to\infty} f(x) = L$$ if as $$x$$ moves increasingly far from the origin in the … Read moreLimits Involving Infinity – Limits and Continuity

## Computing Limits II: The Squeeze Theorem – Application Proof

One very important application of the squeeze theorem is the proof that $$\displaystyle \lim_{\theta \to 0} \frac{\sin \theta}{\theta} = 1$$. We present this proof next. This proof is for the limit as $$\theta\to 0^+$$. The case for $$\theta\to 0^-$$ can be proved in exactly the same manner and we leave it as an exercise to … Read moreComputing Limits II: The Squeeze Theorem – Application Proof

Computing  Limits I In order to compute a limit algebraically, one needs to know what is and more importantly what is not allowed when manipulating limits. For example consider computing$\lim_{x\to 1}\frac{x^2-1}{x-1}.$One cannot just substitute $$x=1$$ into this expression because doing so results in the indeterminate form $$0/0$$. By factoring the top of the … Read moreComputing Limits I – Limits and Continuity