- #1
- 2
- 0
Homework Statement
lim(x -->0) (1-cos(14x))/(xsin(18x))
Homework Equations
None?
The Attempt at a Solution
The hint tells me to use L'hopital's rule through which I got
lim(x-->0) (sin(14x))/(18xcos(18x)+sin(18x)) (I factored out the 14 in the numerator)
That gave me a 0/0 so I did L'hopital's rule again, through which I got
lim(x-->0) (cos(14x))/(cos(18x)-9xsin(18x)) (I factored out 14/2)
This gives me 98, which is wrong. (As x-->0, the function becomes 1, leaving what I factored out as 98)
I'm not sure what to do here. Help? :(
Last edited: