In this video Ill show you how to find the limit of a function involving infinity by looking at key features in its equation. Use the limit definition to compute the derivative f x for. Add or subtract the numerators and then cancel terms.
For example follow the steps to find the limit.
As x approaches 9 both numerator and denominator approach 0. Find limits at infinity. The range of the cosine function is-1. The limit doesnt exist.