Re: sines problem



On Mar 1, 12:25 pm, jankri...@xxxxxxxxxxx wrote:
On 1 Mar, 18:11, olegtsodi...@xxxxxxxxx wrote:

If we have a finite set of angles, phi_i (i=1,2,...,N<inf), then can
one always find an integer n>0 such that
sin(n*phi_i) are all non-negative ?

It is quite easy to find a counter-example already for N = 2.

---
J K Hauglandhttp://home.no.net/zamunda

Can you give a counterexample, please?
Oleg

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