Question

For x close to 0, sin ( x) is approximately?
a. x
b. 2x
c. cos ( x)
d. 1− cos^2 x
e. sin ( x) / x
f. None of these.

Answer 1

A

Stems from the fact that the limit, as x goes to 0, of sin(x)/x=1.

See here:

http://oregonstate.edu/instruct/mth251/cq/Stage3/Lesson/sinExample.html

Answer 2

thanks go blue! that is exactly what I did. Thanks for adding the link!