Section 3.3.  Read from Example 2  to the end of the section. Answer the following questions by 7:00 am.  Send an e-mail with subject line MA251 to

1) What is the (limit as x approaches 0) of (sin 7x) / (4x)  ?

1) 7/4

Nicholas Allen

2) What is the 26th derivative of cos x?

-cos x
Scotty Blankinship

3) In Example 6, Dr. Stewart uses a trigonometric identity and a key algebraic step to manipulate an expression into a form where the limit is clear.  What is the key algebraic step

Divide the numerator and denominator by x 
Darcey Jones