Sequence: an = cos(n*pi/2) convergent or divergent?

[paulxzt]

Determine whether the sequence is convergent or divergent. In case of convergence, find it's limit.

an = cos(n*pi/2)

thanks for any help.

 

[arthur ohlsten]

The sequence does not converge but is bounded by -1 and 1
The plot is a series of plus and minus kroneker deltas.

I believe this is what your instructor wants
Arthur