Question from Kathy, a student:

Hi! I was just wondering how to do this question:

lim 1-cos2x/xsinx as x approaches 0

Thanks,

Kathy

Kathy,

You want to evaluate

lim 1-cos^{2}x/xsinx as x approaches 0

Can you see how to use the fact that sin^{2}(x) + cos^{2}(x) = 1?

Penny