Recent content by CathyC

Sorry, I still can't work it out :'( took some time to play around with it, but I still can't see it. It takes me a long time to see the obvious with trig.

Can you give me a bigger hint then that? I've always been terrible at trig. I tried looking at sin(2theta)=2(sintheta)(costheta) and playing around with that but it doesn't seem to get me anywhere as theta can be anything.

Homework Statement How can I show that the limit exists (or doesn't exist) for this function and prove it? I can't think of a function that will sandwich it to show it's 0 or a way to set x and y to make the limit not equal to zero! (oh and I'm trying to do all this without the use of delta...

1. Use the sandwich theorem to compute the limit as n goes to infinity of the sequence with the following nth elements: a(n) = [1 + sin(n*pi/3)cos(n*pi/5) ] / [n^0.5] I would really appreciate some help with this one guys. If you could please go slow with the answer as my trig is pretty...