Question

limit as x approaches 0 (1-cos^2x/x)

Answer 1

\[\lim_{x \rightarrow 0}\frac{1-\cos^2x}{0}\]

Answer 2

its over x not 0

Answer 3

\[\lim_{x \rightarrow 0}\frac{1-\cos^2x}{x}\]

Answer 4

right

Answer 5

Have you learned the L'Hopital's rule?

Answer 6

no

Answer 7

L'Hospital's *

Answer 8

Ohh, okay.

Answer 9

what is it?

Answer 10

it is a rule, that when a limit is indeterminate form (after plugging the value that x approaches), THEN you can take the derivative on top and bottom.

Answer 11

But if you haven;t learned about derivatives yet, then don't worry about it.

Answer 12

have you learned derivatives though?

Answer 13

yes i know that the bottom is 1

Answer 14

but im having trouble finding the derivative of the top

Answer 15

the

Answer 16

part

Answer 17

which is equal to right?