I don't know how to do this proof. Help please!! Thanks!!
P phyxius117 New member Joined Feb 22, 2010 Messages 9 Oct 28, 2010 #1 I don't know how to do this proof. Help please!! Thanks!!
D daon Senior Member Joined Jan 27, 2006 Messages 1,284 Oct 28, 2010 #2 Assume it was. Then for epsilon = 1/2 there is a delta such that -delta < x < delta => -1/2 < sin(1/x) < 1/2 but we can find an n such that 1/n < delta so that 1/(pi*n) < delta.
Assume it was. Then for epsilon = 1/2 there is a delta such that -delta < x < delta => -1/2 < sin(1/x) < 1/2 but we can find an n such that 1/n < delta so that 1/(pi*n) < delta.
