CPM Homework Help : CALC Problem 9-42

Hint (a):

What is cos(0)?

Hint (b):

$\text{What is }\lim_{x\rightarrow0}\frac{1-\cos(x)}{x}\text{?}$

Hint (c):

$\text{This is }\lim_{x\rightarrow0}\text{ }\ln\Big(\frac{\sin(x)}{x}\cdot\frac{1}{x+1}\Big).$

Hint (d):

Use l'Hôpital's Rule.