Sometimes, combining trigonometric identities and applying the special limit theorems early in the solution, combined with refactoring the equation, will help reduce the function to a manageable solution.
$\underset{x\to 0}{lim}\frac{sec\mathrm{\left(x\right)}-1}{x}$
Limits and Trig Functions

The URL listed above can be inserted into your postings or e-mails; it will point to the text or area of the graph that you have selected.

• Drag your mouse across any text in the green problem area, or
• Drag your mouse to form a selection box on the green graph area
• Open the e-Blink tab to display this tab.
• Copy the text above to your clipboard
• When editing a note to your community or editing your e-mail, select some text and press the link button.