# Cosine limit

1. Oct 19, 2009

### Jules18

I'm trying to remember a limit I was supposed to have memorized for calc. Is this right?

limx-->0 [Cosx - 1]/x = 0

I know it was something like that, but I'm not sure

Thanks
~Jules~

2. Oct 19, 2009

### Bohrok

That's right. You can find the limit by using some algebra and limx→0 sinx/x = 1

3. Oct 19, 2009

### lurflurf

I call that limit cos'(0)=-sin(0)=0