Chapter 2.2, Problem 29E

Estimating limits graphically and numerically Use a graph of f estimate $\underset{x\to a}{\lim }f\left(x\right)$or to show that the limit does not exist. Evaluate f(x) near x = a to support your conjecture.

29.     $f\left(x\right)=\frac{1-\cos \left(2x-2\right)}{{\left(x-1\right)}^2};a=1$